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

oxyd.fr · 87.252.1.29:443

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=oxyd.fr
Issuer
C=US O=Let's Encrypt CN=YR2
Valid from
2026-10-19T17:04:24+00:00
Expires
2027-01-17T17:04:23+00:00
Days remaining
71
Serial (hex)
06AD565112C4F2B2CB703DC7C600AA107812
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

DNS:oxyd.fr, DNS:www.oxyd.fr

SHA-256 fingerprint

74:07:45:83:F6:30:BD:DF:54:41:D9:24:2D:82:E8:05:2E:B3:55:61:A7:97:15:63:4B:B4:7E:18:97:78:48:B3
Certificate extensions & PEM
keyUsage
Digital Signature, Key Encipherment
extendedKeyUsage
TLS Web Server Authentication
basicConstraints
CA:FALSE
subjectKeyIdentifier
7A:98:27:F5:58:39:6A:25:13:EC:98:19:4A:22:74:7A:93:D2:75:B7
authorityKeyIdentifier
40:15:2D:26:79:ED:32:20:9E:DF:9A:72:1D:D6:32:1F:81:0C:81:0C
authorityInfoAccess
CA Issuers - URI:http://yr2.i.lencr.org/
subjectAltName
DNS:oxyd.fr, DNS:www.oxyd.fr
certificatePolicies
Policy: 2.23.140.1.2.1
crlDistributionPoints
Full Name: URI:http://yr2.c.lencr.org/19.crl
ct_precert_scts
Signed Certificate Timestamp: Version : v1 (0x0) Log ID : D6:D5:8D:A9:D0:17:53:F3:6A:4A:A0:C7:57:49:02:AF: EB:C7:DC:2C:D3:8C:D9:F7:64:C8:0C:89:19:1E:9F:02 Timestamp : Oct 19 18:02:55.088 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:46:02:21:00:9A:16:26:EC:6E:F5:6C:D5:8C:5E:BD: 6A:44:FB:9D:D9:3F:4D:B8:2B:3E:ED:E6:3A:FC:1F:8B: A3:E8:F2:B7:63:02:21:00:ED:3B:BD:EE:8B:3C:01:43: F2:12:5A:96:16:F1:D4:B7:7E:40:2E:B9:6A:74:C1:AB: F6:0F:EE:BC:8E:F3:BD:DA Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 44:E8:22:FC:2B:AB:0E:92:EE:D0:E9:FA:D6:96:64:60: 27:76:D0:17:60:E0:89:05:09:C9:23:A1:B0:3F:C3:7F Timestamp : Oct 19 18:02:52.088 2026 GMT Extensions: 00:00:05:00:0C:D9:45:6D Signature : ecdsa-with-SHA256 30:44:02:20:69:18:6E:E9:66:FF:2C:04:5C:5B:8E:0B: E5:7B:7D:84:2A:AC:8C:EF:C1:F5:D4:55:61:E7:10:E7: C6:85:D2:E2:02:20:46:9E:9A:6F:5B:2E:01:91:58:C6: 77:DE:91:35:B0:1C:1C:7B:46:7E:BA:08:94:A7:8F:77: 02:A6:7D:17:4B:4A
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: TLS_AES_256_GCM_SHA384 · Checked 2026-11-06T22:51:18+00:00

Server-presented chain · 1 additional certificate

Chain certificate 1

Subject
C=US O=Let's Encrypt CN=YR2
Issuer
C=US O=ISRG CN=Root YR
Valid from
2025-09-03T00:00:00+00:00
Expires
2028-09-02T23:59:59+00:00
Days remaining
666
Serial (hex)
4EBD24947E24D394802D84A52FD5B319
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

23:8B:85:A0:09:9C:65:B9:70:47:7D:57:24:F1:A1:D4:75:CE:50:58:CF:FE:4E:FA:87:33:89:9B:DB:86:3C:47
Certificate extensions & PEM
keyUsage
Digital Signature, Certificate Sign, CRL Sign
extendedKeyUsage
TLS Web Server Authentication
basicConstraints
CA:TRUE, pathlen:0
subjectKeyIdentifier
40:15:2D:26:79:ED:32:20:9E:DF:9A:72:1D:D6:32:1F:81:0C:81:0C
authorityKeyIdentifier
DE:E7:5B:60:D0:22:6D:40:28:7D:3F:0D:01:FE:A4:B5:52:B4:51:94
authorityInfoAccess
CA Issuers - URI:http://yr.i.lencr.org/
certificatePolicies
Policy: 2.23.140.1.2.1
crlDistributionPoints
Full Name: URI:http://yr.c.lencr.org/ 
-----BEGIN CERTIFICATE-----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==
-----END CERTIFICATE-----

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

View certificate JSON

Registration / WHOIS →DNS records →