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THE CERTIFICATE BEHIND THE CONNECTION

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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

mail.antic.cm · 154.126.128.59:443

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=*.antic.cm
Issuer
C=CM O=National Agency for Information and Communication Technologies CN=ANTIC DV CA
Valid from
2025-12-03T08:38:25+00:00
Expires
2026-12-03T08:38:24+00:00
Days remaining
62
Serial (hex)
16948302F01EF975C9FDA6C6253D0287
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

DNS:*.antic.cm, DNS:antic.cm

SHA-256 fingerprint

18:64:3B:ED:52:8F:73:29:01:76:80:68:44:EB:BF:08:2D:CB:CA:9C:29:60:7D:1F:AB:83:4C:63:8C:1A:05:8F
Certificate extensions & PEM
basicConstraints
CA:FALSE
crlDistributionPoints
Full Name: URI:http://anticdv.crl.certum.pl/anticdv.crl
authorityInfoAccess
OCSP - URI:http://anticdv.ocsp-certum.com CA Issuers - URI:http://repository.certum.pl/anticdv.cer
authorityKeyIdentifier
4D:4D:1A:5D:45:92:91:28:55:70:AD:DA:96:57:E6:1F:D6:48:D8:5A
subjectKeyIdentifier
4D:4F:E6:68:C9:2A:31:EE:4E:C6:DB:AF:98:B7:25:F1:35:20:49:71
certificatePolicies
Policy: 2.23.140.1.2.1 Policy: 1.2.616.1.113527.2.5.1.9.43.3 CPS: https://www.certum.pl/CPS
extendedKeyUsage
TLS Web Server Authentication, TLS Web Client Authentication
keyUsage
Digital Signature, Key Encipherment
subjectAltName
DNS:*.antic.cm, DNS:antic.cm
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 : Dec 3 08:38:26.667 2025 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:20:61:0A:F6:58:D0:E3:2F:12:B8:80:C8:4F: F9:BA:82:E5:DA:6C:65:8A:86:2F:26:27:3B:EF:1B:8C: 93:94:62:B9:02:21:00:93:4D:37:B0:39:7E:BB:F5:BD: 1C:34:00:97:79:69:C2:11:FA:84:FB:E1:68:95:65:1E: 52:CC:84:26:74:49:14 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 : Dec 3 08:38:26.677 2025 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:20:0C:A2:EB:4E:18:52:25:06:A4:AB:43:1F: 89:D8:00:39:2E:6B:F5:2C:D8:A0:46:BC:9E:98:22:77: A2:2F:DC:C4:02:21:00:F8:87:36:5A:A8:D0:D4:5E:5C: D7:72:39:42:1F:DD:3E:D2:D5:84:C5:3D:51:53:ED:27: 02:2E:0E:9B:B1:B5:7D 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 : Dec 3 08:38:26.705 2025 GMT Extensions: none Signature : ecdsa-with-SHA256 30:44:02:20:16:76:D5:3A:19:54:2A:E1:11:9D:D1:EF: 0F:96:11:C2:1A:E0:77:33:35:13:96:61:A8:7D:B3:C2: 77:71:07:A4:02:20:23:A3:A1:FC:82:79:76:46:60:BD: C3:1D:CD:76:3A:DE:5D:9A:C2:C0:30:CC:37:E2:41:92: AD:D4:7F:53:49:3D
-----BEGIN CERTIFICATE-----
MIIGKzCCBROgAwIBAgIQFpSDAvAe+XXJ/abGJT0ChzANBgkqhkiG9w0BAQsFADBs
MQswCQYDVQQGEwJDTTFHMEUGA1UECgw+TmF0aW9uYWwgQWdlbmN5IGZvciBJbmZv
cm1hdGlvbiBhbmQgQ29tbXVuaWNhdGlvbiBUZWNobm9sb2dpZXMxFDASBgNVBAMM
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AfWYEcSD44fWW+1Ul+ZfaYUBSK4j09+h/lcLxetcja0aDc5mWBpSoiaxHNwTuEE=
-----END CERTIFICATE-----

Cipher: TLS_AES_256_GCM_SHA384 · Checked 2026-10-01T08:57:25+00:00

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

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