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

abrenik.com · 77.104.64.43:443

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
CN=*.abrenik.com
Issuer
C=PL O=Asseco Data Systems S.A. CN=Certum DV TLS G2 R39 CA
Valid from
2026-02-02T06:15:38+00:00
Expires
2027-02-02T06:15:37+00:00
Days remaining
117
Serial (hex)
634BD35D9EB5556146845A9FCDF61AC3
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

DNS:*.abrenik.com, DNS:abrenik.com

SHA-256 fingerprint

0B:D3:54:50:C0:EB:3D:28:3C:F8:54:AA:73:B7:F7:A5:F2:C4:B1:EF:46:51:6C:97:49:AB:C8:89:47:78:F4:28
Certificate extensions & PEM
basicConstraints
CA:FALSE
crlDistributionPoints
Full Name: URI:http://certumdvtlsg2r39ca.crl.certum.pl/certumdvtlsg2r39ca.crl
authorityInfoAccess
OCSP - URI:http://certumdvtlsg2r39ca.ocsp-certum.com CA Issuers - URI:http://certumdvtlsg2r39ca.repository.certum.pl/certumdvtlsg2r39ca.cer
authorityKeyIdentifier
33:A8:77:B7:01:38:6F:5F:1F:24:24:A2:1E:6C:14:E3:6E:22:03:DF
certificatePolicies
Policy: 2.23.140.1.2.1 Policy: 1.2.616.1.113527.2.101.1
extendedKeyUsage
TLS Web Server Authentication, TLS Web Client Authentication
keyUsage
Digital Signature, Key Encipherment
subjectAltName
DNS:*.abrenik.com, DNS:abrenik.com
ct_precert_scts
Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 60:4C:9A:AF:7A:7F:77:5F:01:D4:06:FC:92:0D:C8:99: EB:0B:1C:7D:F8:C9:52:1B:FA:FA:17:77:3B:97:8B:C9 Timestamp : Feb 2 06:15:50.425 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:20:03:A7:AD:D4:B6:57:E4:8A:51:A9:27:06: DB:05:24:EE:D7:2C:9E:51:42:E9:D9:D3:59:80:E3:B0: 07:93:2C:8F:02:21:00:CA:6E:B6:F1:E1:F3:3E:42:6C: 66:56:37:38:3A:83:E3:E4:28:FA:CD:5D:04:1B:F5:E3: 7C:D1:38:31:50:49:9F Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 59:6E:6C:33:86:94:B2:59:72:A2:56:C8:A0:E8:DD:90: 4A:76:E8:08:3D:DA:87:3B:01:08:38:28:14:3C:EE:59 Timestamp : Feb 2 06:15:50.633 2026 GMT Extensions: 00:00:05:00:00:1F:E2:D3 Signature : ecdsa-with-SHA256 30:45:02:21:00:AA:94:3F:66:54:16:E3:D7:E2:87:72: 5E:5E:92:41:63:0B:3C:B7:99:C0:22:CF:A4:B4:30:45: 9A:CA:9F:93:81:02:20:69:AB:DF:A5:AE:B6:63:24:C3: 9B:87:D8:3F:F9:A2:FC:73:5A:4F:EA:F6:15:7F:2D:0B: 35:C4:D2:E5:B1:52:9E Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 1C:9F:68:2C:E9:FA:F0:45:69:50:F8:1B:96:8A:87:DD: DB:32:10:D8:4C:E6:C8:B2:E3:82:52:4A:C4:CF:59:9F Timestamp : Feb 2 06:15:50.712 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:21:00:AA:C6:D7:E1:8B:A6:78:82:3A:69:F7: 0B:47:9E:27:B9:96:1E:C7:91:85:D1:40:9F:A0:80:2C: 6C:C8:3C:1D:F4:02:20:6C:BD:93:C5:63:92:89:0E:2A: 19:BE:39:57:26:76:3F:BB:66:05:FB:B8:20:82:A1:BE: 9C:AA:17:92:4E:79:B6
-----BEGIN CERTIFICATE-----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==
-----END CERTIFICATE-----

Cipher: TLS_AES_128_GCM_SHA256 · Checked 2026-10-07T11:30:33+00:00

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

View certificate JSON

Registration / WHOIS →DNS records →