Check DNS, Urls + Redirects, Certificates and Content of your Website

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Why should you only use Prefix - Cookies? |
Hall of Fame - A+ and A

 

Shortcuts: 1. IP-Addresses | 2. DNSSEC | 3. Name Servers | 4. SOA-Entries | 5. Screenshots | 6. Url-Checks | 7. Comments | 8. Connections | 9. Certificates | 10. CT-Logs | 11. Html-Content | 12. Html-Parsing | 13. NameServer-IPAddresses | 14. CAA | 15. TXT | 16. DomainServiceEntries | 17. Cipher Suites | 18. Portchecks |

 

B

 

Missing HSTS or Cookie-warnings

 

Checked:
13.02.2026 10:54:58

 

Older results

No older results found

 

1. IP-Addresses

HostTypeIP-Addressis auth.∑ Queries∑ Timeout
preptai.app
A
185.158.133.1
Frankfurt am Main/Hesse/Germany (DE) - Cloudflare, Inc.
No Hostname found
yes
1
0

AAAA

yes


www.preptai.app

Name Error
yes
1
0
*.preptai.app
A
Name Error
yes



AAAA
Name Error
yes



CNAME
Name Error
yes


 

2. DNSSEC

Zone (*)DNSSEC - Informations


Zone: (root)

(root)
1 DS RR published






DS with Algorithm 8, KeyTag 20326, DigestType 2 and Digest 4G1EuAuPHTmpXAsNfGXQhFjogECbvGg0VxBCN8f47I0=






• Status: Valid because published






3 DNSKEY RR found






Public Key with Algorithm 8, KeyTag 20326, Flags 257 (SEP = Secure Entry Point)






Public Key with Algorithm 8, KeyTag 21831, Flags 256






Public Key with Algorithm 8, KeyTag 38696, Flags 257 (SEP = Secure Entry Point)






1 RRSIG RR to validate DNSKEY RR found






RRSIG-Owner (root), Algorithm: 8, 0 Labels, original TTL: 172800 sec, Signature-expiration: 03.03.2026, 00:00:00 +, Signature-Inception: 10.02.2026, 00:00:00 +, KeyTag 20326, Signer-Name: (root)






• Status: Good - Algorithmus 8 and DNSKEY with KeyTag 20326 used to validate the DNSKEY RRSet






• Status: Valid Chain of trust. Parent-DS with Algorithm 8, KeyTag 20326, DigestType 2 and Digest "4G1EuAuPHTmpXAsNfGXQhFjogECbvGg0VxBCN8f47I0=" validates local Key with the same values, Key ist Secure Entry Point (SEP) of the zone



Zone: app

app
1 DS RR in the parent zone found






DS with Algorithm 8, KeyTag 23684, DigestType 2 and Digest OlzIox4CyUq6ZGGRL6u36fXjSVe7YRSlWoZNlq7DGDY=






1 RRSIG RR to validate DS RR found






RRSIG-Owner app., Algorithm: 8, 1 Labels, original TTL: 86400 sec, Signature-expiration: 26.02.2026, 05:00:00 +, Signature-Inception: 13.02.2026, 04:00:00 +, KeyTag 21831, Signer-Name: (root)






• Status: Good - Algorithmus 8 and DNSKEY with KeyTag 21831 used to validate the DS RRSet in the parent zone






3 DNSKEY RR found






Public Key with Algorithm 8, KeyTag 23684, Flags 257 (SEP = Secure Entry Point)






Public Key with Algorithm 8, KeyTag 38193, Flags 256






Public Key with Algorithm 8, KeyTag 45106, Flags 256






1 RRSIG RR to validate DNSKEY RR found






RRSIG-Owner app., Algorithm: 8, 1 Labels, original TTL: 300 sec, Signature-expiration: 03.03.2026, 18:19:55 +, Signature-Inception: 09.02.2026, 18:19:55 +, KeyTag 23684, Signer-Name: app






• Status: Good - Algorithmus 8 and DNSKEY with KeyTag 23684 used to validate the DNSKEY RRSet






• Status: Valid Chain of trust. Parent-DS with Algorithm 8, KeyTag 23684, DigestType 2 and Digest "OlzIox4CyUq6ZGGRL6u36fXjSVe7YRSlWoZNlq7DGDY=" validates local Key with the same values, Key ist Secure Entry Point (SEP) of the zone



Zone: preptai.app

preptai.app
0 DS RR in the parent zone found






DS-Query in the parent zone has a valid NSEC3 RR as result with the hashed query name "drm0kja1q9nc3fcc3omc9i944703skha" between the hashed NSEC3-owner "drm0kja1q9nc3fcc3omc9i944703skha" and the hashed NextOwner "drm0lb477mejc556d7bog915ct1rivva". So the parent zone confirmes the not-existence of a DS RR.
Bitmap: No Bitmap? Validated: RRSIG-Owner drm0kja1q9nc3fcc3omc9i944703skha.app., Algorithm: 8, 2 Labels, original TTL: 900 sec, Signature-expiration: 03.03.2026, 18:19:55 +, Signature-Inception: 09.02.2026, 18:19:55 +, KeyTag 38193, Signer-Name: app






0 DNSKEY RR found









Zone: www.preptai.app

www.preptai.app
0 DS RR in the parent zone found

 

3. Name Servers

DomainNameserverNS-IP
www.preptai.app
•  ns1043.ui-dns.de

preptai.app
•  ns1016.ui-dns.biz / 8560_de-fra-fr7_customer-dns81
217.160.81.16
Frankfurt am Main/Hesse/Germany (DE) - IONOS SE		•

• 
2001:8d8:fe:53:0:d9a0:5110:100
Berlin/State of Berlin/Germany (DE) - 1&1 IONOS SE		•

•  ns1043.ui-dns.de / 8560_de-fra-fr7_customer-dns80
217.160.80.43
Frankfurt am Main/Hesse/Germany (DE) - IONOS SE		•

• 
2001:8d8:fe:53:0:d9a0:502b:100
Berlin/State of Berlin/Germany (DE) - 1&1 IONOS SE		•

•  ns1060.ui-dns.com / 8560_de-kae-bs_customer-dns82
217.160.82.60
Frankfurt am Main/Hesse/Germany (DE) - IONOS SE		•

• 
2001:8d8:fe:53:0:d9a0:523c:100
Berlin/State of Berlin/Germany (DE) - 1&1 IONOS SE		•

•  ns1064.ui-dns.org / 8560_de-kae-bs_customer-dns83
217.160.83.64
Frankfurt am Main/Hesse/Germany (DE) - IONOS SE		•

• 
2001:8d8:fe:53:0:d9a0:5340:100
Berlin/State of Berlin/Germany (DE) - 1&1 IONOS SE		•
app
•  ns-tld1.charlestonroadregistry.com
•

•  ns-tld2.charlestonroadregistry.com
•

•  ns-tld3.charlestonroadregistry.com
•

•  ns-tld4.charlestonroadregistry.com
•

•  ns-tld5.charlestonroadregistry.com
•

 

4. SOA-Entries


Domain:app
Zone-Name:app
Primary:ns-tld1.charlestonroadregistry.com
Mail:cloud-dns-hostmaster.google.com
Serial:101427
Refresh:21600
Retry:3600
Expire:259200
TTL:900
num Entries:5


Domain:preptai.app
Zone-Name:preptai.app
Primary:ns1043.ui-dns.de
Mail:hostmaster.1und1.com
Serial:2017060112
Refresh:28800
Retry:7200
Expire:604800
TTL:600
num Entries:8


Domain:www.preptai.app
Zone-Name:
Primary:
Mail:
Serial:
Refresh:
Retry:
Expire:
TTL:
num Entries:1


5. Screenshots

Startaddress: https://preptai.app/, address used: https://preptai.app/, Screenshot created 2026-02-13 10:55:48 +00:0

 

Mobil (412px x 732px)

 

260 milliseconds

 

Screenshot mobile - https://preptai.app/
Mobil + Landscape (732px x 412px)

 

255 milliseconds

 

Screenshot mobile landscape - https://preptai.app/
Screen (1280px x 1680px)

 

313 milliseconds

 

Screenshot Desktop - https://preptai.app/

 

Mobile- and other Chrome-Checks


widthheight
visual Viewport397732
content Size3973326

 

Good: No horizontal scrollbar. Content-size width = visual Viewport width.

 

6. Url-Checks


:

:
DomainnameHttp-StatusredirectSec.G
• http://preptai.app/
185.158.133.1
301
https://preptai.app/

0.186

Date: Fri, 13 Feb 2026 09:55:35 GMT
Connection: keep-alive
Location: https://preptai.app/
Strict-Transport-Security: max-age=31536000; includeSubDomains
Referrer-Policy: strict-origin-when-cross-origin
X-Content-Type-Options: nosniff
Set-Cookie: __cf_bm=1xe1AHwQcwu4Ha3jvFRQvtEzvXZWXdo1xswjX0FcNjc-1770976534.9160342-1.0.1.1-aU38ix8DODudyuFhGazAYaXZY5Scfh2fGtbCwo48aZqCsKHsKYOhCECqiKVzGP9Q4_.8AaMULTlLsZaTRuS7pbuQ6oadBYVDSU3K7a33xEYqRv_4BOLkrFatXZZviyZt; HttpOnly; Path=/; Domain=lovable.app; Expires=Fri, 13 Feb 2026 10:25:35 GMT
Server: cloudflare
CF-RAY: 9cd3736f3e6be504-TXL
Content-Length: 0

• https://preptai.app/
185.158.133.1 gzip used - 1136 / 2326 - 51.16 %
Inline-JavaScript (∑/total): 0/0 Inline-CSS (∑/total): 0/0		200

Html is minified: 106.55 %
Other inline scripts (∑/total): 0/0		2.030
B
Date: Fri, 13 Feb 2026 09:55:35 GMT
Transfer-Encoding: chunked
Connection: keep-alive
Set-Cookie: __cf_bm=An59ha.dHGcuHMo6BEPs0YA78PZ2GzSBLxIAQP9E7h8-1770976535.1473165-1.0.1.1-q5aEWvncNiUAH9p0NDvrRMAmZ7zCrjRMPVGbumnBgPjfBOgcCwfhC6gjJ4ergclmpzTx.ZPybOAPFhabJeyzf_plt.B6qzDG.kZSaBxw84MaU.E9DxIRNhcewv40HGtf; HttpOnly; Secure; Path=/; Domain=lovable.app; Expires=Fri, 13 Feb 2026 10:25:35 GMT
Strict-Transport-Security: max-age=31536000; includeSubDomains
Referrer-Policy: strict-origin-when-cross-origin
X-Content-Type-Options: nosniff
ETag: W/"1a8da1cc5432f0645ef66b957b80c2bf"
Server: cloudflare
CF-RAY: 9cd37370afea3917-TXL
Content-Type: text/html; charset=utf-8
Content-Encoding: gzip
Content-Length: 1136

• http://preptai.app/.well-known/acme-challenge/check-your-website-dot-server-daten-dot-de
185.158.133.1
301
https://preptai.app/.well-known/acme-challenge/check-your-website-dot-server-daten-dot-de

0.104

Visible Content:
Date: Fri, 13 Feb 2026 09:55:38 GMT
Connection: keep-alive
Location: https://preptai.app/.well-known/acme-challenge/check-your-website-dot-server-daten-dot-de
Strict-Transport-Security: max-age=31536000; includeSubDomains
Referrer-Policy: strict-origin-when-cross-origin
X-Content-Type-Options: nosniff
Set-Cookie: __cf_bm=ckzL6GeOyjSibvVnDgkdoWtB8JILRWHlFRJp0CE48lM-1770976538.846997-1.0.1.1-FUb.XW2AF4tK13mayVzU0NcK68vZypc1aPa_GR5ChjfzqWtelLCpkN0jSWP9KNvfDH.G3q59uqO8i5cICK4rpBt1_KJXGXkPZwg5KXANZbpz9fVwhc6CRoLUCQzbDg7v; HttpOnly; Path=/; Domain=lovable.app; Expires=Fri, 13 Feb 2026 10:25:38 GMT
Server: cloudflare
CF-RAY: 9cd37387cdece504-TXL
Content-Length: 0

• https://preptai.app/.well-known/acme-challenge/check-your-website-dot-server-daten-dot-de
gzip used - 29 / 9 - -222.22 %
Inline-JavaScript (∑/total): 0/0 Inline-CSS (∑/total): 0/0		404

Html is minified: 100.00 %
Other inline scripts (∑/total): 0/0		2.120
B
Not Found
Visible Content:
Date: Fri, 13 Feb 2026 09:55:39 GMT
Transfer-Encoding: chunked
Connection: keep-alive
Strict-Transport-Security: max-age=31536000; includeSubDomains
Referrer-Policy: strict-origin-when-cross-origin
X-Content-Type-Options: nosniff
Set-Cookie: __cf_bm=dSvb5r__jvjcXFeysUxXv.NunLx9kdoVqT02h5hclqo-1770976539.058-1.0.1.1-D4gfxUDUGgXB8OqcHyZssYUVK.WlfGBoTFvzUgwWkPY40DX8L9oVqcKf.dnYAJC7ACqq6byVPbtV.9L.6YDcMPcMtjI8eNxxL58vhFus1ED.ZC5avKPsaJEF83s6KxKa; HttpOnly; Secure; Path=/; Domain=lovable.app; Expires=Fri, 13 Feb 2026 10:25:39 GMT
Server: cloudflare
CF-RAY: 9cd373891ea26e5c-TXL
Content-Type: text/plain; charset=UTF-8
Content-Encoding: gzip
Content-Length: 29

• https://185.158.133.1/
185.158.133.1
-103


0.027
P
SecureConnectionError (3, 0x80131501). The SSL connection could not be established, see inner exception. Authentication failed because the remote party sent a TLS alert: 'HandshakeFailure'. (FF: SSL_ERROR_NO_CYPHER_OVERLAP)

 

7. Comments


1. General Results, most used to calculate the result

Aname "preptai.app" is domain, public suffix is ".app", top-level-domain is ".app", top-level-domain-type is "generic", tld-manager is "Charleston Road Registry Inc.", num .app-domains preloaded: 47 (complete: 276475)
AGood: All ip addresses are public addresses
Warning: Only one ip address found: preptai.app has only one ip address.
Warning: No ipv6 address found. Ipv6 is the future with a lot of new features. So every domain name should have an ipv6 address. See https://en.wikipedia.org/wiki/IPv6: preptai.app has no ipv6 address.
AGood: No asked Authoritative Name Server had a timeout
ADNS: "Name Error" means: No www-dns-entry defined. This isn't a problem
AGood: destination is https
AGood - only one version with Http-Status 200
AGood: one preferred version: non-www is preferred
AGood: every cookie sent via https is marked as secure
AExcellent: Domain is in the Google-Preload-List
AExcellent: Domain is in the Mozilla/Firefox-Preload-List
AHSTS-Preload-Status: Preloaded. Check https://hstspreload.org/ to learn some basics about the Google-Preload-List.
AGood: All urls with http status 200/404 have a complete Content-Type header (MediaType / MediaSubType + correct charset)
http://preptai.app/ 185.158.133.1
301
__cf_bm=1xe1AHwQcwu4Ha3jvFRQvtEzvXZWXdo1xswjX0FcNjc-1770976534.9160342-1.0.1.1-aU38ix8DODudyuFhGazAYaXZY5Scfh2fGtbCwo48aZqCsKHsKYOhCECqiKVzGP9Q4_.8AaMULTlLsZaTRuS7pbuQ6oadBYVDSU3K7a33xEYqRv_4BOLkrFatXZZviyZt; HttpOnly; Path=/; Domain=lovable.app; Expires=Fri, 13 Feb 2026 10:25:35 GMT
Fatal: Cookie sent via http. Never send Cookies / Session-Cookies via http. If a user uses an insecure WLan and if the same cookie is used to managed the authenticated session, it's possible to hack that user. Same with HttpOnly - without https that's only decorative.
http://preptai.app/.well-known/acme-challenge/check-your-website-dot-server-daten-dot-de 185.158.133.1
301
__cf_bm=ckzL6GeOyjSibvVnDgkdoWtB8JILRWHlFRJp0CE48lM-1770976538.846997-1.0.1.1-FUb.XW2AF4tK13mayVzU0NcK68vZypc1aPa_GR5ChjfzqWtelLCpkN0jSWP9KNvfDH.G3q59uqO8i5cICK4rpBt1_KJXGXkPZwg5KXANZbpz9fVwhc6CRoLUCQzbDg7v; HttpOnly; Path=/; Domain=lovable.app; Expires=Fri, 13 Feb 2026 10:25:38 GMT
Fatal: Cookie sent via http. Never send Cookies / Session-Cookies via http. If a user uses an insecure WLan and if the same cookie is used to managed the authenticated session, it's possible to hack that user. Same with HttpOnly - without https that's only decorative.
Bhttp://preptai.app/ 185.158.133.1
301
__cf_bm=1xe1AHwQcwu4Ha3jvFRQvtEzvXZWXdo1xswjX0FcNjc-1770976534.9160342-1.0.1.1-aU38ix8DODudyuFhGazAYaXZY5Scfh2fGtbCwo48aZqCsKHsKYOhCECqiKVzGP9Q4_.8AaMULTlLsZaTRuS7pbuQ6oadBYVDSU3K7a33xEYqRv_4BOLkrFatXZZviyZt; HttpOnly; Path=/; Domain=lovable.app; Expires=Fri, 13 Feb 2026 10:25:35 GMT
Cookie without a SameSite-Attribute. Possible values are: Strict/Lax/None. Cookie may not work as expected, if "None" is wanted, but browsers use "Lax" as default value.
Bhttps://preptai.app/ 185.158.133.1
200
__cf_bm=An59ha.dHGcuHMo6BEPs0YA78PZ2GzSBLxIAQP9E7h8-1770976535.1473165-1.0.1.1-q5aEWvncNiUAH9p0NDvrRMAmZ7zCrjRMPVGbumnBgPjfBOgcCwfhC6gjJ4ergclmpzTx.ZPybOAPFhabJeyzf_plt.B6qzDG.kZSaBxw84MaU.E9DxIRNhcewv40HGtf; HttpOnly; Secure; Path=/; Domain=lovable.app; Expires=Fri, 13 Feb 2026 10:25:35 GMT
Cookie without a SameSite-Attribute. Possible values are: Strict/Lax/None. Cookie may not work as expected, if "None" is wanted, but browsers use "Lax" as default value.
Bhttp://preptai.app/.well-known/acme-challenge/check-your-website-dot-server-daten-dot-de 185.158.133.1
301
__cf_bm=ckzL6GeOyjSibvVnDgkdoWtB8JILRWHlFRJp0CE48lM-1770976538.846997-1.0.1.1-FUb.XW2AF4tK13mayVzU0NcK68vZypc1aPa_GR5ChjfzqWtelLCpkN0jSWP9KNvfDH.G3q59uqO8i5cICK4rpBt1_KJXGXkPZwg5KXANZbpz9fVwhc6CRoLUCQzbDg7v; HttpOnly; Path=/; Domain=lovable.app; Expires=Fri, 13 Feb 2026 10:25:38 GMT
Cookie without a SameSite-Attribute. Possible values are: Strict/Lax/None. Cookie may not work as expected, if "None" is wanted, but browsers use "Lax" as default value.
Bhttps://preptai.app/.well-known/acme-challenge/check-your-website-dot-server-daten-dot-de
404
__cf_bm=dSvb5r__jvjcXFeysUxXv.NunLx9kdoVqT02h5hclqo-1770976539.058-1.0.1.1-D4gfxUDUGgXB8OqcHyZssYUVK.WlfGBoTFvzUgwWkPY40DX8L9oVqcKf.dnYAJC7ACqq6byVPbtV.9L.6YDcMPcMtjI8eNxxL58vhFus1ED.ZC5avKPsaJEF83s6KxKa; HttpOnly; Secure; Path=/; Domain=lovable.app; Expires=Fri, 13 Feb 2026 10:25:39 GMT
Cookie without a SameSite-Attribute. Possible values are: Strict/Lax/None. Cookie may not work as expected, if "None" is wanted, but browsers use "Lax" as default value.
Info: Checking the ip addresses of that domain name not exact one certificate found. So it's impossible to check if that domain requires Server Name Indication (SNI).: Domain preptai.app, 1 ip addresses.
BNo _mta-sts TXT record found (mta-sts: Mail Transfer Agent Strict Transport Security - see RFC 8461). Read the result of server-daten.de (Url-Checks, Comments, Connections and DomainServiceRecords) to see a complete definition. Domainname: _mta-sts.preptai.app

2. Header-Checks

Apreptai.app 185.158.133.1
X-Content-Type-Options
Ok: Header without syntax errors found: nosniff
A
Referrer-Policy
Ok: Header without syntax errors found: strict-origin-when-cross-origin
Fpreptai.app 185.158.133.1
Content-Security-Policy
Critical: Missing Header:
Fpreptai.app 185.158.133.1
Permissions-Policy
Critical: Missing Header:
Bpreptai.app 185.158.133.1
Cross-Origin-Embedder-Policy
Info: Missing Header
Bpreptai.app 185.158.133.1
Cross-Origin-Opener-Policy
Info: Missing Header
Bpreptai.app 185.158.133.1
Cross-Origin-Resource-Policy
Info: Missing Header

3. DNS- and NameServer - Checks

AInfo:: 52 Root-climbing DNS Queries required to find all IPv4- and IPv6-Addresses of 4 Name Servers.
AInfo:: 52 Queries complete, 52 with IPv6, 0 with IPv4.
AGood: All DNS Queries done via IPv6.
Bad (greater 8):: An average of 13.0 queries per domain name server required to find all ip addresses of all name servers.
AInfo:: 4 different Name Servers found: ns1016.ui-dns.biz, ns1043.ui-dns.de, ns1060.ui-dns.com, ns1064.ui-dns.org, 4 Name Servers included in Delegation: ns1016.ui-dns.biz, ns1043.ui-dns.de, ns1060.ui-dns.com, ns1064.ui-dns.org, 4 Name Servers included in 1 Zone definitions: ns1016.ui-dns.biz, ns1043.ui-dns.de, ns1060.ui-dns.com, ns1064.ui-dns.org, 1 Name Servers listed in SOA.Primary: ns1043.ui-dns.de.
AGood: Only one SOA.Primary Name Server found.: ns1043.ui-dns.de.
AGood: SOA.Primary Name Server included in the delegation set.: ns1043.ui-dns.de.
AGood: Consistency between delegation and zone. The set of NS records served by the authoritative name servers must match those proposed for the delegation in the parent zone. Ordered list of name servers: ns1016.ui-dns.biz, ns1043.ui-dns.de, ns1060.ui-dns.com, ns1064.ui-dns.org
AGood: All Name Server Domain Names have a Public Suffix.
AGood: All Name Server Domain Names ending with a Public Suffix have minimal one IPv4- or IPv6 address.
AGood: All Name Server ip addresses are public.
AGood: Minimal 2 different name servers (public suffix and public ip address) found: 4 different Name Servers found
AGood: All name servers have ipv4- and ipv6-addresses.: 4 different Name Servers found
AGood: Name servers with different Top Level Domains / Public Suffix List entries found: 4 Name Servers, 4 Top Level Domains: de, org, com, biz
AGood: Name Servers with different domain names found.: 4 different Domains found
Warning: All Name Servers from the same Country / IP location.: 4 Name Servers, 1 Countries: DE
AInfo: Ipv4-Subnet-list: 4 Name Servers, 1 different subnets (first Byte): 217., 1 different subnets (first two Bytes): 217.160., 4 different subnets (first three Bytes): 217.160.80., 217.160.81., 217.160.82., 217.160.83.
AGood: Name Server IPv4-addresses from different subnet found:
AInfo: IPv6-Subnet-list: 4 Name Servers with IPv6, 1 different subnets (first block): 2001:, 1 different subnets (first two blocks): 2001:08d8:, 1 different subnets (first three blocks): 2001:08d8:00fe:, 1 different subnets (first four blocks): 2001:08d8:00fe:0053:
Fatal: All Name Server IPv6 addresses from the same subnet.
AGood: Nameserver supports TCP connections: 8 good Nameserver
AGood: Nameserver supports Echo Capitalization: 8 good Nameserver
AGood: Nameserver supports EDNS with max. 512 Byte Udp payload, message is smaller: 8 good Nameserver
AGood: Nameserver has passed 10 EDNS-Checks (OP100, FLAGS, V1, V1OP100, V1FLAGS, DNSSEC, V1DNSSEC, NSID, COOKIE, CLIENTSUBNET): 8 good Nameserver
Nameserver doesn't pass all EDNS-Checks: ns1043.ui-dns.de: OP100: no result. FLAGS: no result. V1: no result. V1OP100: no result. V1FLAGS: no result. DNSSEC: no result. V1DNSSEC: no result. NSID: no result. COOKIE: no result. CLIENTSUBNET: no result.
AGood: All SOA have the same Serial Number
Warning: No CAA entry with issue/issuewild found, every CAA can create a certificate. Read https://en.wikipedia.org/wiki/DNS_Certification_Authority_Authorization to learn some basics about the idea of CAA. Your name server must support such an entry. Not all dns providers support CAA entries.

4. Content- and Performance-critical Checks

AGood: All checks /.well-known/acme-challenge/random-filename without redirects answer with the expected http status 404 - Not Found. Creating a Letsencrypt certificate via http-01 challenge should work. If it doesn't work: Check your vHost configuration (apachectl -S, httpd -S, nginx -T). Every combination of port and ServerName / ServerAlias (Apache) or Server (Nginx) must be unique. Merge duplicated entries in one vHost. If you use an IIS, extensionless files must be allowed in the /.well-known/acme-challenge subdirectory. Create a web.config in that directory. Content: <configuration><system.webServer><staticContent><mimeMap fileExtension="." mimeType="text/plain" /></staticContent></system.webServer></configuration>. If you have a redirect http ⇒ https, that's ok, Letsencrypt follows such redirects to port 80 / 443 (same or other server). There must be a certificate. But the certificate may be expired, self signed or with a not matching domain name. Checking the validation file Letsencrypt ignores such certificate errors. Trouble creating a certificate? Use https://community.letsencrypt.org/ to ask.
AGood: Every https result with status 200 and greater 1024 Bytes is compressed (gzip, deflate, br checked).
AGood: No https + http status 200 with inline CSS / JavaScript found
AGood: Every https result with status 200 has a minified Html-Content with a quota lower then 110 %.
AGood: Every https connection via port 443 supports the http/2 protocol via ALPN.
AGood: Some script Elements (type text/javascript) with a src-Attribute have a defer / async - Attribute. So loading and executing these JavaScripts doesn't block parsing and rendering the Html-Output.
https://preptai.app/ 185.158.133.1
200

Critical: Some script Elements (type text/javascript) with a src-Attribute don't have a defer / async - Attribute. Loading and executing these JavaScripts blocks parsing and rendering the Html-Output. That's bad if your site is large or the connection is slow / mobile usage. Use "async" if the js file has only functions (so nothing is executed after parsing the file) or is independend. Use "defer" if the order of the scripts is important. All "defer" scripts are executed before the DOMContentLoaded event is fired. Check https://developer.mozilla.org/en-US/docs/Web/HTML/Element/script to see some details.: 1 script elements without defer/async.
AGood: All CSS / JavaScript files are sent compressed (gzip, deflate, br checked). That reduces the content of the files. 3 external CSS / JavaScript files found
Warning: CSS / JavaScript files with a missing or too short Cache-Control header found. Browsers should cache and re-use these files. 2 external CSS / JavaScript files without Cache-Control-Header, 0 with Cache-Control, but no max-age, 1 with Cache-Control max-age too short (minimum 7 days), 0 with Cache-Control long enough, 3 complete.
AGood: All checked attribute values are enclosed in quotation marks (" or ').
AInfo: No img element found, no alt attribute checked
AGood: Domainname is not on the "Specially Designated Nationals And Blocked Persons List" (SDN). That's an US-list of individuals and companies owned or controlled by, or acting for or on behalf of, targeted countries. It also lists individuals, groups, and entities, such as terrorists and narcotics traffickers designated under programs that are not country-specific. Collectively, such individuals and companies are called "Specially Designated Nationals" or "SDNs." Their assets are blocked and U.S. persons are generally prohibited from dealing with them. So if a domain name is on that list, it's impossible to create a Letsencrypt certificate with that domain name. Check the list manual - https://www.treasury.gov/resource-center/sanctions/sdn-list/pages/default.aspx
http://preptai.app/ 185.158.133.1
301

Warning: HSTS header sent via http has no effect
https://preptai.app/.well-known/acme-challenge/check-your-website-dot-server-daten-dot-de
404
2.120 seconds
Warning: 404 needs more then one second
ADuration: 54797 milliseconds, 54.797 seconds

 

8. Connections

DomainIPPortCert.ProtocolKeyExchangeStrengthCipherStrengthHashAlgorithmOCSP stapling
Domain/KeyExchangeIP/StrengthPort/CipherCert./StrengthProtocol/HashAlgorithmOCSP stapling
preptai.app
185.158.133.1
443
ok
Tls12
ECDH Ephermal
255
Aes128
128
Sha256
supported
ok
preptai.app
185.158.133.1
443
ok
Tls12

ECDH Ephermal
255
Aes128
128
Sha256
supported
ok
http/2 via ALPN supported 
Tls.1.2
no Tls.1.1
no Tls.1.0
no Ssl3
no Ssl2
http/2 via ALPN supported
 Tls.1.2
no Tls.1.1
no Tls.1.0
no Ssl3
no Ssl2
Chain (complete)

1CN=preptai.app


2CN=WE1, O=Google Trust Services, C=US


3CN=GTS Root R4, O=Google Trust Services LLC, C=US


preptai.app
preptai.app
443
ok
Tls12
ECDH Ephermal
255
Aes128
128
Sha256
supported
ok

preptai.app
preptai.app
443
ok
Tls12

ECDH Ephermal
255
Aes128
128
Sha256
supported
ok
http/2 via ALPN supported 
Tls.1.2
no Tls.1.1
no Tls.1.0
no Ssl3
no Ssl2
http/2 via ALPN supported
 Tls.1.2
no Tls.1.1
no Tls.1.0
no Ssl3
no Ssl2
Chain (complete)

1CN=preptai.app


2CN=WE1, O=Google Trust Services, C=US


3CN=GTS Root R4, O=Google Trust Services LLC, C=US

 

9. Certificates

1.
1.
CN=preptai.app
22.01.2026
22.04.2026
expires in 41 days		preptai.app - 1 entry
1.
1.
CN=preptai.app
22.01.2026

22.04.2026
expires in 41 days


preptai.app - 1 entry

KeyalgorithmEC Public Key (256 bit, prime256v1)
Signatur:ECDSA SHA256
Serial Number:009E3066D500C9C7CF136D3DEDC14EDCFB
Thumbprint:6A9E7BFB851E13F2FDC7EA23D9BFE8C2A4FD45BF
SHA256 / Certificate:fybkSGYHFIIBs4GIA23voqFKNoLl7DeSLw7e0qtQEUc=
SHA256 hex / Cert (DANE * 0 1):e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855
SHA256 hex / PublicKey (DANE * 1 1):b082f353a53c3df819105ccc025265513a8461e3e4a634ae00f894b4aacd2cf2
SHA256 hex / Subject Public Key Information (SPKI):b082f353a53c3df819105ccc025265513a8461e3e4a634ae00f894b4aacd2cf2 (is buggy, ignore the result)
SPKI checked via https://v1.pwnedkeys.com/spki-hash:Good: Key isn't compromised
OCSP - Url:http://o.pki.goog/s/we1/njA
OCSP - must staple:no
Certificate Transparency:yes
Enhanced Key Usage:Serverauthentifizierung (1.3.6.1.5.5.7.3.1)




2.
CN=WE1, O=Google Trust Services, C=US
13.12.2023
20.02.2029
expires in 1076 days

2.
CN=WE1, O=Google Trust Services, C=US
13.12.2023

20.02.2029
expires in 1076 days




KeyalgorithmEC Public Key (256 bit, prime256v1)
Signatur:ECDSA SHA384
Serial Number:7FF31977972C224A76155D13B6D685E3
Thumbprint:108FBF794E18EC5347A414E4370CC4506C297AB2
SHA256 / Certificate:HfwWBfutNY2LyET3bRUgP6ycpcGnn9SFf/ryhk++v5Y=
SHA256 hex / Cert (DANE * 0 1):e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855
SHA256 hex / PublicKey (DANE * 1 1):908769e8d34477cc2cba0632c88605b22d7294c0840f78596d247c645b1afc0e
SHA256 hex / Subject Public Key Information (SPKI):
SPKI checked via https://v1.pwnedkeys.com/spki-hash:Check unknown. No result 404 / 200
OCSP - Url:
OCSP - must staple:no
Certificate Transparency:no
Enhanced Key Usage:Serverauthentifizierung (1.3.6.1.5.5.7.3.1), Clientauthentifizierung (1.3.6.1.5.5.7.3.2)




3.
CN=GTS Root R4, O=Google Trust Services LLC, C=US
15.11.2023
28.01.2028
expires in 687 days

3.
CN=GTS Root R4, O=Google Trust Services LLC, C=US
15.11.2023

28.01.2028
expires in 687 days




KeyalgorithmEC Public Key (384 bit, secp384r1)
Signatur:SHA256 With RSA-Encryption
Serial Number:7FE530BF331343BEDD821610493D8A1B
Thumbprint:932BED339AA69212C89375B79304B475490B89A0
SHA256 / Certificate:drJ7gKWAJ9w88dpo2sFwEO2TmX0LYD4vrb6FASSTtac=
SHA256 hex / Cert (DANE * 0 1):e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855
SHA256 hex / PublicKey (DANE * 1 1):9847e5653e5e9e847516e5cb818606aa7544a19be67fd7366d506988e8d84347
SHA256 hex / Subject Public Key Information (SPKI):
SPKI checked via https://v1.pwnedkeys.com/spki-hash:Check unknown. No result 404 / 200
OCSP - Url:
OCSP - must staple:no
Certificate Transparency:no
Enhanced Key Usage:Serverauthentifizierung (1.3.6.1.5.5.7.3.1), Clientauthentifizierung (1.3.6.1.5.5.7.3.2)




4.
CN=GlobalSign Root CA, OU=Root CA, O=GlobalSign nv-sa, C=BE
01.09.1998
28.01.2028
expires in 687 days

4.
CN=GlobalSign Root CA, OU=Root CA, O=GlobalSign nv-sa, C=BE
01.09.1998

28.01.2028
expires in 687 days




KeyalgorithmRSA encryption (2048 bit)
Signatur:SHA-1 with RSA Encryption
Serial Number:040000000001154B5AC394
Thumbprint:B1BC968BD4F49D622AA89A81F2150152A41D829C
SHA256 / Certificate:69QQQOS7PsdCyeOB0x7ypBpItmhclufO88HfbNQzHJk=
SHA256 hex / Cert (DANE * 0 1):ebd41040e4bb3ec742c9e381d31ef2a41a48b6685c96e7cef3c1df6cd4331c99
SHA256 hex / PublicKey (DANE * 1 1):2bcee858158cf5465fc9d76f0dfa312fef25a4dca8501da9b46b67d1fbfa1b64
SHA256 hex / Subject Public Key Information (SPKI):2bcee858158cf5465fc9d76f0dfa312fef25a4dca8501da9b46b67d1fbfa1b64
SPKI checked via https://v1.pwnedkeys.com/spki-hash:Good: Key isn't compromised
OCSP - Url:
OCSP - must staple:no
Certificate Transparency:no
Enhanced Key Usage:




 

10. Last Certificates - Certificate Transparency Log Check

1. Source CertSpotter - active certificates (one check per day)

Issuerlast 7 daysactivenum Certs
CN=WE1, O=Google Trust Services, C=US
0
1
1
CN=WR1, O=Google Trust Services, C=US
0
1
1
CN=Sectigo Public Server Authentication CA DV R36, O=Sectigo Limited, C=GB
0
1
1

CertSpotter-IdIssuernot beforenot afterDomain namesLE-Duplicatenext LE
13520715299
leaf cert		CN=WE1, O=Google Trust Services, C=US
2026-01-22 01:40:52
2026-04-22 02:40:46
preptai.app - 1 entries


13520714320
precert		CN=WR1, O=Google Trust Services, C=US
2026-01-22 01:40:40
2026-04-22 02:40:15
preptai.app - 1 entries


13530226152
leaf cert		CN=Sectigo Public Server Authentication CA DV R36, O=Sectigo Limited, C=GB
2026-01-22 00:00:00
2027-01-22 23:59:59
*.preptai.app, preptai.app - 2 entries


 

2. Source crt.sh - old and new certificates, sometimes very slow - only certificates with "not after" > of the last months are listed

No CRT - CT-Log entries found

 

11. Html-Content - Entries

Summary


Subresource Integrity (SRI)
DomainnameHtmlElementrel/property∑∑ size∑ problems∑ int.∑ ext.∑ Origin poss.∑ SRI ParseErrors∑ SRI valid∑ SRI missing
https://preptai.app/
185.158.133.1		link
stylesheet
1
43,021 Bytes
0
1
0
0
0
0


link
other
6
438,545 Bytes
0
5
0
0
0
0


meta
og
4
469,905 Bytes
0
0
1
0
0
0


meta
twitter
4
469,905 Bytes
0
0
1
0
0
0


meta
other
5

0


0
0
0


script

2
537,628 Bytes
0
2
0
0
0
0

 

Details (currently limited to 500 rows - some problems with spam users)

DomainnameHtml-Elementname/equiv/ property/relhref/src/contentHttpStatusmsg∑Status
https://preptai.app/
185.158.133.1
link
apple-touch-icon
/icon.png
200

4
ok
image/png
X-Content-Type-Options nosniff found




No Cache-Control header
No Compression - 87709 Bytes






ETag: "2947c47166d598ea1309cc0e15bec474"



link
canonical
https://prept.ai


1
ok















link
icon
/icon.png
200

1
ok
image/png
X-Content-Type-Options nosniff found




No Cache-Control header
No Compression - 87709 Bytes






ETag: "2947c47166d598ea1309cc0e15bec474"



link
stylesheet
/assets/index-D-lBfFxI.css
200

1
ok
text/css; charset=utf-8
X-Content-Type-Options nosniff found




No Cache-Control - header
Compression (gzip): 43021/211460 Bytes






ETag: W/"0ae51ae715e50bb4d79a0b7112e07d19"

local SRI possible, possible hash-values:

 

sha256-zys9ATzDQdZ4pEMeAys5TB+klUmUu+OtAFqDo8d7djU=
sha384-tTJslnMylHAnQgEycnRLPDuWW4dacBqyI5AZKvZBAYfPQHHHzWUnnXMArsWfqU9b
sha512-WDH2t6IKWaqM0eHQ9WFnG4VoYP6nZ6uSK159P9U37DtFN+Tg444YSVjY2HbxI9ZRwuC8xcA6nB1vhRTmodx94w==

 

<link rel="stylesheet" href="/assets/index-D-lBfFxI.css" crossorigin="anonymous" integrity="sha256-zys9ATzDQdZ4pEMeAys5TB+klUmUu+OtAFqDo8d7djU=" />



meta
charset
 UTF-8


1
ok















meta
og:description
Your 24/7 AI study companion. Get personalised tutoring, instant feedback, and powerful memorisation tools for HSC success.


1
ok















meta
og:image
https://pub-bb2e103a32db4e198524a2e9ed8f35b4.r2.dev/75a5068e-9025-4e55-ae0c-1a2dfc292eb0/id-preview-d952bcb4--65239f77-f3af-457a-ab51-8159a14a58da.lovable.app-1770971678526.png
200

1
ok
image/png
missing X-Content-Type-Options nosniff




No Cache-Control header
No Compression - 469905 Bytes






ETag: "bfc89aec22a157f3769595c5ad2d65a8"

Server-Header Access-Control-Allow-Origin: not found
Cross-Origin Resource Sharing (CORS) not supported



meta
og:title
prept.ai - AI-Powered HSC Tutoring


1
ok















meta
og:type
website


1
ok















meta
author
prept.ai


1
ok















meta
description
Study smarter with prept.ai. Get 24/7 AI tutoring, essay feedback, practice questions, and memorisation tools — all aligned to the Australian HSC syllabus. Just $10/month.


1
ok















meta
keywords
HSC, tutoring, AI tutor, Australian education, Year 11, Year 12, English, Maths, Economics, study help, ATAR


1
ok















meta
twitter:card
summary_large_image


1
ok















meta
twitter:description
Your 24/7 AI study companion for HSC success.


1
ok















meta
twitter:image
https://pub-bb2e103a32db4e198524a2e9ed8f35b4.r2.dev/75a5068e-9025-4e55-ae0c-1a2dfc292eb0/id-preview-d952bcb4--65239f77-f3af-457a-ab51-8159a14a58da.lovable.app-1770971678526.png
200

1
ok
image/png
missing X-Content-Type-Options nosniff




No Cache-Control header
No Compression - 469905 Bytes






ETag: "bfc89aec22a157f3769595c5ad2d65a8"

Server-Header Access-Control-Allow-Origin: not found
Cross-Origin Resource Sharing (CORS) not supported



meta
twitter:title
prept.ai - AI-Powered HSC Tutoring


1
ok















meta
viewport
width=device-width, initial-scale=1.0


1
ok















script
src
/assets/index-C50fH4-R.js
200

1
ok
Missing defer / async attribute. text/javascript; charset=utf-8
X-Content-Type-Options nosniff found




No Cache-Control - header
Compression (gzip): 529299/1886936 Bytes






ETag: W/"f363757329a4539525376871255a2fea"

local SRI possible, possible hash-values:

 

sha256-bqgdobza6H0NBIVzAmT6uMJ9lrAjOX8gaChkAUWIEU8=
sha384-77mm9iGIQGg1B9WOvo1shewo0aleDgeqlhFibRMr+BGOBAjlVyu+OgdH31s0tIjb
sha512-l4pE05GEdImnvDHTYd8i4k9b9WBanRgkr1SmDIk6gpzd6F1MgVxJctq4imezljCEVBVI3tKNhnA8vsV4nHIUCg==

 

<script src="/assets/index-C50fH4-R.js" crossorigin="anonymous" integrity="sha256-bqgdobza6H0NBIVzAmT6uMJ9lrAjOX8gaChkAUWIEU8=" />



script
src
https://preptai.app/~flock.js
200

1
ok
defer attribute found text/javascript; charset=utf-8
X-Content-Type-Options nosniff found




Cache-Control: max-age=1500 - max-age too short.
Compression (gzip): 8329/21296 Bytes






local SRI possible, possible hash-values:

 

sha256-qG4IS0+CcJgUvmwV/WMF2qeD/ah62VQC2ppNOh3W10g=
sha384-V3g1siK6WrbxrDTU9k+iPDwWTg6u1+Kki/c9SG92PvllMycbOkgQRFKptovaHh9+
sha512-GN0VJeK02J48RtkjZ/ygIM+Z+weFas/ZaiXcdBBhHuqDtDjJFpFoOYNJWUXrBKlCe8Y+Kjg8vpNEn03w6x3bUQ==

 

<script src="https://preptai.app/~flock.js" crossorigin="anonymous" integrity="sha256-qG4IS0+CcJgUvmwV/WMF2qeD/ah62VQC2ppNOh3W10g=" />


 

12. Html-Parsing via https://validator.w3.org/nu/

Url used (first standard-https-result with http status 200): https://preptai.app/

Summary

Good: No non-document-errors
0 errors
0 warnings

 

13. Nameserver - IP-Adresses

Required Root-climbing DNS-Queries to find ip addresses of all Name Servers: ns1016.ui-dns.biz, ns1043.ui-dns.de, ns1060.ui-dns.com, ns1064.ui-dns.org

 

QNr.DomainTypeNS used
1
biz
NS
k.root-servers.net (2001:7fd::1)

Answer: a.gtld.biz, b.gtld.biz, c.gtld.biz, m.gtld.biz, n.gtld.biz, w.gtld.biz, x.gtld.biz, y.gtld.biz
2
ns1016.ui-dns.biz
NS
a.gtld.biz (2001:502:ad09::30)

Answer: ns-biz.ui-dns.biz, ns-biz.ui-dns.com, ns-biz.ui-dns.de, ns-biz.ui-dns.org

Answer: ns-biz.ui-dns.biz
185.132.33.195, 2001:8d8:fe:53:0:d9a0:51c3:100, 217.160.81.195, 2607:f1c0:fe:53:185:132:33:195
3
de
NS
d.root-servers.net (2001:500:2d::d)

Answer: a.nic.de, f.nic.de, l.de.net, n.de.net, s.de.net, z.nic.de
4
ns1043.ui-dns.de
NS
a.nic.de (2001:678:2::53)

Answer: ns-de.ui-dns.biz, ns-de.ui-dns.com, ns-de.ui-dns.de, ns-de.ui-dns.org

Answer: ns-de.ui-dns.de
185.132.32.193, 2001:8d8:fe:53:0:d9a0:50c1:100, 217.160.80.193, 2607:f1c0:fe:53:185:132:32:193
5
com
NS
l.root-servers.net (2001:500:9f::42)

Answer: a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net, e.gtld-servers.net, f.gtld-servers.net, g.gtld-servers.net, h.gtld-servers.net, i.gtld-servers.net, j.gtld-servers.net, k.gtld-servers.net, l.gtld-servers.net, m.gtld-servers.net
6
ns1060.ui-dns.com
NS
a.gtld-servers.net (2001:503:a83e::2:30)

Answer: ns-com.ui-dns.biz, ns-com.ui-dns.com, ns-com.ui-dns.de, ns-com.ui-dns.org

Answer: ns-com.ui-dns.com
185.132.34.214, 2001:8d8:fe:53:0:d9a0:52d6:100, 217.160.82.214, 2607:f1c0:fe:53:185:132:34:214
7
org
NS
c.root-servers.net (2001:500:2::c)

Answer: a0.org.afilias-nst.info, a2.org.afilias-nst.info, b0.org.afilias-nst.org, b2.org.afilias-nst.org, c0.org.afilias-nst.info, d0.org.afilias-nst.org
8
ns1064.ui-dns.org
NS
a0.org.afilias-nst.info (2001:500:e::1)

Answer: ns-org.ui-dns.biz, ns-org.ui-dns.com, ns-org.ui-dns.de, ns-org.ui-dns.org

Answer: ns-org.ui-dns.org
185.132.34.194, 2001:8d8:fe:53:0:d9a0:52c2:100, 217.160.82.194, 2607:f1c0:fe:53:185:132:34:194
9
ns-biz.ui-dns.com
NS
a.gtld-servers.net (2001:503:a83e::2:30)

Answer: ns-com.ui-dns.biz, ns-com.ui-dns.com, ns-com.ui-dns.de, ns-com.ui-dns.org

Answer: ns-com.ui-dns.com
185.132.34.214, 2001:8d8:fe:53:0:d9a0:52d6:100, 217.160.82.214, 2607:f1c0:fe:53:185:132:34:214
10
ns-biz.ui-dns.de
NS
a.nic.de (2001:678:2::53)

Answer: ns-de.ui-dns.biz, ns-de.ui-dns.com, ns-de.ui-dns.de, ns-de.ui-dns.org

Answer: ns-de.ui-dns.de
185.132.32.193, 2001:8d8:fe:53:0:d9a0:50c1:100, 217.160.80.193, 2607:f1c0:fe:53:185:132:32:193
11
ns-biz.ui-dns.org
NS
a0.org.afilias-nst.info (2001:500:e::1)

Answer: ns-org.ui-dns.biz, ns-org.ui-dns.com, ns-org.ui-dns.de, ns-org.ui-dns.org

Answer: ns-org.ui-dns.org
185.132.34.194, 2001:8d8:fe:53:0:d9a0:52c2:100, 217.160.82.194, 2607:f1c0:fe:53:185:132:34:194
12
ns-de.ui-dns.biz
NS
a.gtld.biz (2001:502:ad09::30)

Answer: ns-biz.ui-dns.biz, ns-biz.ui-dns.com, ns-biz.ui-dns.de, ns-biz.ui-dns.org

Answer: ns-biz.ui-dns.biz
185.132.33.195, 2001:8d8:fe:53:0:d9a0:51c3:100, 217.160.81.195, 2607:f1c0:fe:53:185:132:33:195
13
ns-de.ui-dns.com
NS
a.gtld-servers.net (2001:503:a83e::2:30)

Answer: ns-com.ui-dns.biz, ns-com.ui-dns.com, ns-com.ui-dns.de, ns-com.ui-dns.org

Answer: ns-com.ui-dns.com
185.132.34.214, 2001:8d8:fe:53:0:d9a0:52d6:100, 217.160.82.214, 2607:f1c0:fe:53:185:132:34:214
14
ns-de.ui-dns.org
NS
a0.org.afilias-nst.info (2001:500:e::1)

Answer: ns-org.ui-dns.biz, ns-org.ui-dns.com, ns-org.ui-dns.de, ns-org.ui-dns.org

Answer: ns-org.ui-dns.org
185.132.34.194, 2001:8d8:fe:53:0:d9a0:52c2:100, 217.160.82.194, 2607:f1c0:fe:53:185:132:34:194
15
ns-com.ui-dns.biz
NS
a.gtld.biz (2001:502:ad09::30)

Answer: ns-biz.ui-dns.biz, ns-biz.ui-dns.com, ns-biz.ui-dns.de, ns-biz.ui-dns.org

Answer: ns-biz.ui-dns.biz
185.132.33.195, 2001:8d8:fe:53:0:d9a0:51c3:100, 217.160.81.195, 2607:f1c0:fe:53:185:132:33:195
16
ns-com.ui-dns.de
NS
a.nic.de (2001:678:2::53)

Answer: ns-de.ui-dns.biz, ns-de.ui-dns.com, ns-de.ui-dns.de, ns-de.ui-dns.org

Answer: ns-de.ui-dns.de
185.132.32.193, 2001:8d8:fe:53:0:d9a0:50c1:100, 217.160.80.193, 2607:f1c0:fe:53:185:132:32:193
17
ns-com.ui-dns.org
NS
a0.org.afilias-nst.info (2001:500:e::1)

Answer: ns-org.ui-dns.biz, ns-org.ui-dns.com, ns-org.ui-dns.de, ns-org.ui-dns.org

Answer: ns-org.ui-dns.org
185.132.34.194, 2001:8d8:fe:53:0:d9a0:52c2:100, 217.160.82.194, 2607:f1c0:fe:53:185:132:34:194
18
ns-org.ui-dns.biz
NS
a.gtld.biz (2001:502:ad09::30)

Answer: ns-biz.ui-dns.biz, ns-biz.ui-dns.com, ns-biz.ui-dns.de, ns-biz.ui-dns.org

Answer: ns-biz.ui-dns.biz
185.132.33.195, 2001:8d8:fe:53:0:d9a0:51c3:100, 217.160.81.195, 2607:f1c0:fe:53:185:132:33:195
19
ns-org.ui-dns.com
NS
a.gtld-servers.net (2001:503:a83e::2:30)

Answer: ns-com.ui-dns.biz, ns-com.ui-dns.com, ns-com.ui-dns.de, ns-com.ui-dns.org

Answer: ns-com.ui-dns.com
185.132.34.214, 2001:8d8:fe:53:0:d9a0:52d6:100, 217.160.82.214, 2607:f1c0:fe:53:185:132:34:214
20
ns-org.ui-dns.de
NS
a.nic.de (2001:678:2::53)

Answer: ns-de.ui-dns.biz, ns-de.ui-dns.com, ns-de.ui-dns.de, ns-de.ui-dns.org

Answer: ns-de.ui-dns.de
185.132.32.193, 2001:8d8:fe:53:0:d9a0:50c1:100, 217.160.80.193, 2607:f1c0:fe:53:185:132:32:193
21
ns-biz.ui-dns.com: 185.132.34.195, 217.160.82.195
A
ns-com.ui-dns.com (2001:8d8:fe:53:0:d9a0:52d6:100)
22
ns-biz.ui-dns.com: 2001:8d8:fe:53:0:d9a0:52c3:100, 2607:f1c0:fe:53:185:132:34:195
AAAA
ns-com.ui-dns.com (2001:8d8:fe:53:0:d9a0:52d6:100)
23
ns-biz.ui-dns.de: 185.132.32.195, 217.160.80.195
A
ns-de.ui-dns.de (2001:8d8:fe:53:0:d9a0:50c1:100)
24
ns-biz.ui-dns.de: 2001:8d8:fe:53:0:d9a0:50c3:100, 2607:f1c0:fe:53:185:132:32:195
AAAA
ns-de.ui-dns.de (2001:8d8:fe:53:0:d9a0:50c1:100)
25
ns-biz.ui-dns.org: 185.132.35.195, 217.160.83.195
A
ns-org.ui-dns.org (2001:8d8:fe:53:0:d9a0:52c2:100)
26
ns-biz.ui-dns.org: 2001:8d8:fe:53:0:d9a0:53c3:100, 2607:f1c0:fe:53:185:132:35:195
AAAA
ns-org.ui-dns.org (2001:8d8:fe:53:0:d9a0:52c2:100)
27
ns-de.ui-dns.biz: 185.132.33.193, 217.160.81.193
A
ns-biz.ui-dns.biz (2001:8d8:fe:53:0:d9a0:51c3:100)
28
ns-de.ui-dns.biz: 2001:8d8:fe:53:0:d9a0:51c1:100, 2607:f1c0:fe:53:185:132:33:193
AAAA
ns-biz.ui-dns.biz (2001:8d8:fe:53:0:d9a0:51c3:100)
29
ns-de.ui-dns.com: 185.132.34.193, 217.160.82.193
A
ns-com.ui-dns.com (2001:8d8:fe:53:0:d9a0:52d6:100)
30
ns-de.ui-dns.com: 2001:8d8:fe:53:0:d9a0:52c1:100, 2607:f1c0:fe:53:185:132:34:193
AAAA
ns-com.ui-dns.com (2001:8d8:fe:53:0:d9a0:52d6:100)
31
ns-de.ui-dns.org: 185.132.35.193, 217.160.83.193
A
ns-org.ui-dns.org (2001:8d8:fe:53:0:d9a0:52c2:100)
32
ns-de.ui-dns.org: 2001:8d8:fe:53:0:d9a0:53c1:100, 2607:f1c0:fe:53:185:132:35:193
AAAA
ns-org.ui-dns.org (2001:8d8:fe:53:0:d9a0:52c2:100)
33
ns-com.ui-dns.biz: 185.132.33.194, 217.160.81.194
A
ns-biz.ui-dns.biz (2001:8d8:fe:53:0:d9a0:51c3:100)
34
ns-com.ui-dns.biz: 2001:8d8:fe:53:0:d9a0:51c2:100, 2607:f1c0:fe:53:185:132:33:194
AAAA
ns-biz.ui-dns.biz (2001:8d8:fe:53:0:d9a0:51c3:100)
35
ns-com.ui-dns.de: 185.132.32.194, 217.160.80.194
A
ns-de.ui-dns.biz (2001:8d8:fe:53:0:d9a0:51c1:100)
36
ns-com.ui-dns.de: 2001:8d8:fe:53:0:d9a0:50c2:100, 2607:f1c0:fe:53:185:132:32:194
AAAA
ns-de.ui-dns.biz (2001:8d8:fe:53:0:d9a0:51c1:100)
37
ns-com.ui-dns.org: 185.132.35.194, 217.160.83.194
A
ns-org.ui-dns.org (2001:8d8:fe:53:0:d9a0:52c2:100)
38
ns-com.ui-dns.org: 2001:8d8:fe:53:0:d9a0:53c2:100, 2607:f1c0:fe:53:185:132:35:194
AAAA
ns-org.ui-dns.org (2001:8d8:fe:53:0:d9a0:52c2:100)
39
ns-org.ui-dns.biz: 185.132.33.196, 217.160.81.196
A
ns-biz.ui-dns.biz (2001:8d8:fe:53:0:d9a0:51c3:100)
40
ns-org.ui-dns.biz: 2001:8d8:fe:53:0:d9a0:51c4:100, 2607:f1c0:fe:53:185:132:33:196
AAAA
ns-biz.ui-dns.biz (2001:8d8:fe:53:0:d9a0:51c3:100)
41
ns-org.ui-dns.com: 185.132.34.196, 217.160.82.196
A
ns-com.ui-dns.biz (2607:f1c0:fe:53:185:132:33:194)
42
ns-org.ui-dns.com: 2001:8d8:fe:53:0:d9a0:52c4:100, 2607:f1c0:fe:53:185:132:34:196
AAAA
ns-com.ui-dns.biz (2607:f1c0:fe:53:185:132:33:194)
43
ns-org.ui-dns.de: 185.132.32.196, 217.160.80.196
A
ns-de.ui-dns.biz (2001:8d8:fe:53:0:d9a0:51c1:100)
44
ns-org.ui-dns.de: 2001:8d8:fe:53:0:d9a0:50c4:100, 2607:f1c0:fe:53:185:132:32:196
AAAA
ns-de.ui-dns.biz (2001:8d8:fe:53:0:d9a0:51c1:100)
45
ns1016.ui-dns.biz: 217.160.81.16
A
ns-biz.ui-dns.biz (2001:8d8:fe:53:0:d9a0:51c3:100)
46
ns1016.ui-dns.biz: 2001:8d8:fe:53:0:d9a0:5110:100
AAAA
ns-biz.ui-dns.biz (2001:8d8:fe:53:0:d9a0:51c3:100)
47
ns1043.ui-dns.de: 217.160.80.43
A
ns-de.ui-dns.biz (2001:8d8:fe:53:0:d9a0:51c1:100)
48
ns1043.ui-dns.de: 2001:8d8:fe:53:0:d9a0:502b:100
AAAA
ns-de.ui-dns.biz (2001:8d8:fe:53:0:d9a0:51c1:100)
49
ns1060.ui-dns.com: 217.160.82.60
A
ns-com.ui-dns.biz (2607:f1c0:fe:53:185:132:33:194)
50
ns1060.ui-dns.com: 2001:8d8:fe:53:0:d9a0:523c:100
AAAA
ns-com.ui-dns.biz (2607:f1c0:fe:53:185:132:33:194)
51
ns1064.ui-dns.org: 217.160.83.64
A
ns-org.ui-dns.biz (2607:f1c0:fe:53:185:132:33:196)
52
ns1064.ui-dns.org: 2001:8d8:fe:53:0:d9a0:5340:100
AAAA
ns-org.ui-dns.biz (2607:f1c0:fe:53:185:132:33:196)

 

14. CAA - Entries

DomainnameflagNameValue∑ Queries∑ Timeout
preptai.app
0

no CAA entry found
1
0
app
0

no CAA entry found
1
0

 

15. TXT - Entries

DomainnameTXT EntryStatus∑ Queries∑ Timeout
preptai.app
v=spf1 include:_spf-us.ionos.com ~all
ok
1
0
_acme-challenge.preptai.app

Name Error - The domain name does not exist
1
0
_acme-challenge.preptai.app.preptai.app

Name Error - The domain name does not exist
1
0

 

16. DomainService - Entries

TypeDomainPrefValueDNS-errornum AnswersStatusDescription
MX

preptai.app
10
mx00.ionos.com
02ok

A


74.208.5.3
01ok

CNAME


00ok
MX

preptai.app
10
mx01.ionos.com
02ok

A


74.208.5.21
01ok

CNAME


00ok
SPF
TXT
preptai.app

v=spf1 include:_spf-us.ionos.com ~all
ok

TXT
_spf-us.ionos.com

v=spf1 ip4:74.208.4.192/26 ip4:82.165.159.128/27 ?all
ok

				 
			

				 
			
17. Cipher Suites



Skipped, CDN used or too many ip addresses

				 
			
18. Portchecks



No open Ports <> 80 / 443 found, so no additional Ports checked.



				 
			

				 
			

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