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

TLSv1.2

mx.optic-com.eu · 91.193.156.39:443

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=*.optic-com.eu
Issuer
C=GB O=Sectigo Limited CN=Sectigo Public Server Authentication CA DV R36
Valid from
2026-05-19T00:00:00+00:00
Expires
2026-12-03T23:59:59+00:00
Days remaining
55
Serial (hex)
FEA5D3379D8032175BF7FF747E6DDDA9
Signature
RSA-SHA256
Public key
RSA 4096

Subject alternative names (SAN)

DNS:*.optic-com.eu, DNS:optic-com.eu

SHA-256 fingerprint

38:75:9B:D9:80:C2:75:D8:05:B2:24:85:69:71:37:50:A5:55:25:ED:44:90:AE:44:3E:77:11:13:34:54:8E:7C
Certificate extensions & PEM
authorityKeyIdentifier
68:C0:12:16:18:0E:AF:CE:F6:87:A6:32:57:A3:46:51:5D:CB:07:27
subjectKeyIdentifier
E1:31:74:66:98:0A:68:F1:26:D0:4C:2D:7E:6F:72:E5:01:09:43:2F
keyUsage
Digital Signature, Key Encipherment
basicConstraints
CA:FALSE
extendedKeyUsage
TLS Web Server Authentication, TLS Web Client Authentication
certificatePolicies
Policy: 1.3.6.1.4.1.6449.1.2.2.7 CPS: https://sectigo.com/CPS Policy: 2.23.140.1.2.1
authorityInfoAccess
CA Issuers - URI:http://crt.sectigo.com/SectigoPublicServerAuthenticationCADVR36.crt OCSP - URI:http://ocsp.sectigo.com
subjectAltName
DNS:*.optic-com.eu, DNS:optic-com.eu
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 : May 19 13:30:37.087 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:21:00:F0:A2:13:38:2C:58:95:4E:9B:94:5D: 2D:2A:F6:6C:3B:DC:6D:BB:7E:09:4C:35:4D:86:4B:F7: DE:3F:16:D5:D2:02:20:32:C6:70:FB:79:C8:89:14:7A: 6E:B7:77:FD:92:02:CE:44:C1:D4:7B:11:1F:0C:85:0D: B8:DF:57:4E:3D:01:1B Signed Certificate Timestamp: Version : v1 (0x0) Log ID : C8:A3:C4:7F:C7:B3:AD:B9:35:6B:01:3F:6A:7A:12:6D: E3:3A:4E:43:A5:C6:46:F9:97:AD:39:75:99:1D:CF:9A Timestamp : May 19 13:30:37.153 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:21:00:83:C3:BA:71:12:39:FA:EA:6F:1F:C0: ED:2B:86:2B:B1:70:99:8A:7B:2B:C0:F4:D5:EC:67:FB: 08:0B:B8:D1:9D:02:20:60:F4:95:74:F5:BC:72:17:10: 78:45:06:A5:3B:3A:1D:76:53:FB:2D:53:19:56:E0:07: 25:96:7D:3D:AF:E1:CA Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 6C:FE:50:19:43:A8:5E:A9:16:BC:52:D1:33:E4:DC:C9: 1E:F1:41:1C:7D:25:84:20:D1:73:80:9E:18:18:EB:3A Timestamp : May 19 13:30:37.151 2026 GMT Extensions: 00:00:05:00:0C:46:97:DD Signature : ecdsa-with-SHA256 30:45:02:20:0B:75:54:B6:23:03:47:F4:F9:8F:C0:FB: 4B:34:3D:B1:FE:A6:7D:0B:43:CF:04:A0:5A:14:19:C8: 3B:8B:65:A0:02:21:00:86:4C:15:4A:B5:16:64:89:87: FB:FE:30:CF:9A:25:DE:C3:26:35:06:EC:49:93:1D:95: 16:B8:AC:44:D1:DD:28
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: ECDHE-RSA-AES256-GCM-SHA384 · Checked 2026-10-09T04:24:02+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 →