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

cerfacs.fr · 138.63.8.11:443

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=FR ST=Occitanie L=Toulouse O=CERFACS CN=*.cerfacs.fr
Issuer
C=GR O=Hellenic Academic and Research Institutions CA CN=GEANT TLS RSA 1
Valid from
2025-12-11T08:11:54+00:00
Expires
2026-12-11T08:11:54+00:00
Days remaining
58
Serial (hex)
3729C02C05FE3C2739A913F474389ADB
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

DNS:*.cerfacs.fr, DNS:cerfacs.fr

SHA-256 fingerprint

10:45:68:33:E5:4E:6A:87:D6:B0:B4:33:42:A8:38:EA:C6:64:0F:56:7F:FE:40:1D:30:97:28:37:83:08:D2:76
Certificate extensions & PEM
basicConstraints
CA:FALSE
authorityKeyIdentifier
86:01:72:3F:8C:A9:70:E2:31:06:53:16:CE:01:5F:5B:79:C8:3C:3B
authorityInfoAccess
CA Issuers - URI:http://crt.harica.gr/HARICA-GEANT-TLS-R1.cer OCSP - URI:http://ocsp-tls.harica.gr
subjectAltName
DNS:*.cerfacs.fr, DNS:cerfacs.fr
certificatePolicies
Policy: 2.23.140.1.2.2 Policy: 0.4.0.2042.1.7 Policy: 1.3.6.1.4.1.26513.1.1.1.2
extendedKeyUsage
TLS Web Client Authentication, TLS Web Server Authentication
crlDistributionPoints
Full Name: URI:http://crl.harica.gr/HARICA-GEANT-TLS-R1.crl
subjectKeyIdentifier
F9:DF:B2:EE:B7:63:9A:39:96:2C:A0:5C:E4:99:CD:60:6D:77:21:97
keyUsage
Digital Signature, Key Encipherment
ct_precert_scts
Signed Certificate Timestamp: Version : v1 (0x0) Log ID : AF:67:88:3B:57:B0:4E:DD:8F:A6:D9:7E:F6:2E:A8:EB: 81:0A:C7:71:60:F0:24:5E:55:D6:0C:2F:E7:85:87:3A Timestamp : Dec 11 08:21:55.908 2025 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:21:00:9A:C2:90:9D:CB:AA:F2:31:DA:69:39: 86:3E:47:56:00:1D:92:A5:B7:BE:E3:2E:2C:9B:60:6F: A2:B3:B4:7B:AC:02:20:16:2C:AF:48:BB:06:40:08:15: 26:87:62:E1:A4:D7:62:63:A4:4D:02:90:A3:DE:79:27: 97:5A:41:B4:3D:DD:D6 Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 94:4E:43:87:FA:EC:C1:EF:81:F3:19:24:26:A8:18:65: 01:C7:D3:5F:38:02:01:3F:72:67:7D:55:37:2E:19:D8 Timestamp : Dec 11 08:21:55.923 2025 GMT Extensions: none Signature : ecdsa-with-SHA256 30:44:02:20:08:C7:75:D8:2A:C1:39:2E:BD:95:24:23: CE:A9:B4:7E:DC:1D:73:C4:B4:3E:2B:C7:4A:CC:BF:B4: 4F:C3:09:04:02:20:36:89:50:B0:16:0D:2E:ED:16:E8: D0:53:99:0D:3C:73:77:90:EB:33:8B:A9:D3:D5:F1:20: F6:AF:E6:B4:4C:A4 Signed Certificate Timestamp: Version : v1 (0x0) Log ID : D8:09:55:3B:94:4F:7A:FF:C8:16:19:6F:94:4F:85:AB: B0:F8:FC:5E:87:55:26:0F:15:D1:2E:72:BB:45:4B:14 Timestamp : Dec 11 08:21:55.874 2025 GMT Extensions: none Signature : ecdsa-with-SHA256 30:44:02:20:25:8E:DE:8F:7F:2B:7F:97:64:A3:30:7C: 28:B8:44:9B:39:A1:8A:3D:92:64:09:2A:34:42:3D:7E: 66:F8:22:0E:02:20:14:7F:F0:41:7E:EF:86:1C:DE:F3: CE:F1:A0:27:9D:09:DC:D6:85:05:1E:C1:20:E3:29:A1: 1B:BC:7E:CB:32:C3
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: TLS_AES_128_GCM_SHA256 · Checked 2026-10-13T18:59:25+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 →