DNS
THE CERTIFICATE BEHIND THE CONNECTION

TLS certificate checker.

Inspect SSL/TLS certificates for any public domain or subdomain.

Checks HTTPS on port 443, including subject alternative names, validity dates and the presented chain.

SSL certificate

TLSv1.3

hti.pl · 185.119.15.155:443

Unverified
Certificate verification failed. These are unverified certificate details presented by the server. SSL operation failed with code 1. OpenSSL Error messages: error:0A000086:SSL routines::certificate verify failed

Certificate verification failed

Subject
C=PL ST=wielkopolskie L=Poznan O=Horyzont Technologie Internetowe sp. z o.o. CN=*.hti.pl
Issuer
C=PL O=Asseco Data Systems S.A. CN=Certum OV TLS G2 R39 CA
Valid from
2025-11-23T20:44:31+00:00
Expires
2026-11-23T20:44:30+00:00
Days remaining
44
Serial (hex)
551B893522C5423EEE5E39C0912A9F46
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

DNS:*.hti.pl, DNS:hti.pl

SHA-256 fingerprint

16:E6:02:51:52:DB:F7:97:74:7D:51:C1:DA:1D:B9:61:BE:B3:3B:86:3A:CD:71:44:6E:A4:B1:42:C9:C6:66:25
Certificate extensions & PEM
basicConstraints
CA:FALSE
crlDistributionPoints
Full Name: URI:http://certumovtlsg2r39ca.crl.certum.pl/certumovtlsg2r39ca.crl
authorityInfoAccess
OCSP - URI:http://certumovtlsg2r39ca.ocsp-certum.com CA Issuers - URI:http://certumovtlsg2r39ca.repository.certum.pl/certumovtlsg2r39ca.cer
authorityKeyIdentifier
E8:79:07:6D:8D:83:FB:9A:79:63:63:BC:A5:32:63:B3:05:41:72:A9
certificatePolicies
Policy: 2.23.140.1.2.2 Policy: 1.2.616.1.113527.2.101.2
extendedKeyUsage
TLS Web Server Authentication, TLS Web Client Authentication
keyUsage
Digital Signature, Key Encipherment
subjectAltName
DNS:*.hti.pl, DNS:hti.pl
ct_precert_scts
Signed Certificate Timestamp: Version : v1 (0x0) Log ID : D7:6D:7D:10:D1:A7:F5:77:C2:C7:E9:5F:D7:00:BF:F9: 82:C9:33:5A:65:E1:D0:B3:01:73:17:C0:C8:C5:69:77 Timestamp : Nov 23 20:44:32.585 2025 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:20:77:94:D1:36:9C:CD:07:A5:6B:3A:BB:A7: 44:F9:F1:BD:8B:61:56:BF:3B:0E:E7:A1:10:E4:0F:E1: 1F:F4:CD:0F:02:21:00:AE:40:D5:1B:F5:78:D7:12:B8: 3B:4F:22:45:36:91:62:60:DF:6D:0B:F2:DF:CD:8C:D5: 30:E9:03:B9:BB:36:E6 Signed Certificate Timestamp: Version : v1 (0x0) Log ID : AC:AB:30:70:6C:EB:EC:84:31:F4:13:D2:F4:91:5F:11: 1E:42:24:43:B1:F2:A6:8C:4F:3C:2B:3B:A7:1E:02:C3 Timestamp : Nov 23 20:44:32.922 2025 GMT Extensions: none Signature : ecdsa-with-SHA256 30:44:02:20:3E:0B:46:37:4C:C8:57:EF:66:06:A1:99: 8C:D4:82:A1:29:6F:72:C1:71:C6:73:3F:82:FD:8F:85: 19:1A:AA:06:02:20:03:F1:2E:52:DD:55:03:46:9C:4B: AC:19:05:3E:34:CA:E3:E6:2A:BA:16:8A:DB:96:60:B4: EF:3A:4B:B5:D3:44 Signed Certificate Timestamp: Version : v1 (0x0) Log ID : C2:31:7E:57:45:19:A3:45:EE:7F:38:DE:B2:90:41:EB: C7:C2:21:5A:22:BF:7F:D5:B5:AD:76:9A:D9:0E:52:CD Timestamp : Nov 23 20:44:33.019 2025 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:20:7A:27:B5:38:82:03:74:FA:70:79:8B:80: 17:18:EE:EF:C2:6F:76:F0:BC:9B:46:53:10:FA:D0:82: 04:F7:8C:C7:02:21:00:CA:62:21:D6:F1:15:B9:99:AB: 81:18:54:FA:3A:9A:63:4E:3C:33:CF:AC:3D:4E:AD:4A: B5:97:E5:AF:E8:9F:5F
-----BEGIN CERTIFICATE-----
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MQswCQYDVQQGEwJQTDEhMB8GA1UECgwYQXNzZWNvIERhdGEgU3lzdGVtcyBTLkEu
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-----END CERTIFICATE-----

Cipher: TLS_AES_256_GCM_SHA384 · Checked 2026-10-10T11:43:06+00:00

One endpoint on port 443. Server-presented chain; no revocation, OCSP, CT or full TLS security scan.

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