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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

gedefi.fr · 5.42.152.100:443

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
The certificate has expired.

Certificate verification failed

Subject
CN=www.byoip-france.fr
Issuer
C=US O=Let's Encrypt CN=E8
Valid from
2026-05-22T02:05:40+00:00
Expires
2026-08-20T02:05:39+00:00
Days remaining
-46
Serial (hex)
06D00E6198777779CEF8AA0439CF41961DBD
Signature
ecdsa-with-SHA384
Public key
EC 256 prime256v1

Subject alternative names (SAN)

DNS:www.byoip-france.fr

SHA-256 fingerprint

FD:14:1E:E5:5D:8C:F5:F4:12:56:6D:D2:D8:ED:93:78:FE:F2:B9:3A:D9:F4:94:87:86:B6:FA:53:5C:22:22:0F
Certificate extensions & PEM
keyUsage
Digital Signature
extendedKeyUsage
TLS Web Server Authentication
basicConstraints
CA:FALSE
subjectKeyIdentifier
D3:57:4C:93:73:18:27:23:84:95:50:2C:8D:09:7D:4F:A7:49:B8:1D
authorityKeyIdentifier
8F:0D:13:A2:F6:2E:7E:D1:50:6C:33:18:38:5D:59:8E:23:72:91:CA
authorityInfoAccess
CA Issuers - URI:http://e8.i.lencr.org/
subjectAltName
DNS:www.byoip-france.fr
certificatePolicies
Policy: 2.23.140.1.2.1
crlDistributionPoints
Full Name: URI:http://e8.c.lencr.org/62.crl
ct_precert_scts
Signed Certificate Timestamp: Version : v1 (0x0) Log ID : CB:38:F7:15:89:7C:84:A1:44:5F:5B:C1:DD:FB:C9:6E: F2:9A:59:CD:47:0A:69:05:85:B0:CB:14:C3:14:58:E7 Timestamp : May 22 03:04:10.254 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:46:02:21:00:D2:4D:87:54:FE:F6:7D:75:B4:C9:3B: 9D:5D:2B:CD:5B:A4:99:8A:83:A5:08:4F:C3:50:AE:90: BD:AF:04:80:D9:02:21:00:9B:1E:E7:AC:7C:39:9F:66: 6D:E4:06:18:17:3D:FD:5E:39:90:8A:18:FD:CE:46:71: 1C:91:65:35:E9:E3:FA:76 Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 1A:8B:9D:6B:0F:FE:BF:81:B4:79:39:C6:D2:31:0A:86: D6:D1:02:D4:F0:46:E2:18:2C:9D:E3:5F:5E:26:25:EF Timestamp : May 22 03:04:10.701 2026 GMT Extensions: 00:00:05:00:15:6F:12:99 Signature : ecdsa-with-SHA256 30:45:02:20:34:87:1B:81:90:C1:2A:C5:B3:FA:CC:13: D5:80:29:C5:BB:C9:1A:BD:23:F3:9F:0E:BF:CF:F3:68: 1C:25:47:05:02:21:00:B7:8F:DD:5C:92:36:55:AF:5E: FD:EC:E4:DF:33:54:C7:7D:98:36:1E:DD:BF:8D:0F:76: 6D:10:31:DE:C1:61:9D
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: TLS_AES_128_GCM_SHA256 · Checked 2026-10-04T22:51:53+00:00

Server-presented chain · 1 additional certificate

Chain certificate 1

Subject
C=US O=Let's Encrypt CN=E8
Issuer
C=US O=Internet Security Research Group CN=ISRG Root X1
Valid from
2024-03-13T00:00:00+00:00
Expires
2027-03-12T23:59:59+00:00
Days remaining
159
Serial (hex)
63959363C24E7082715918BFC3D7ED56
Signature
RSA-SHA256
Public key
EC 384 secp384r1

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

83:62:4F:D3:38:C8:D9:B0:23:C1:8A:67:CB:7A:9C:05:19:DA:43:D1:17:75:B4:C6:CB:DA:D4:5C:3D:99:7C:52
Certificate extensions & PEM
keyUsage
Digital Signature, Certificate Sign, CRL Sign
extendedKeyUsage
TLS Web Client Authentication, TLS Web Server Authentication
basicConstraints
CA:TRUE, pathlen:0
subjectKeyIdentifier
8F:0D:13:A2:F6:2E:7E:D1:50:6C:33:18:38:5D:59:8E:23:72:91:CA
authorityKeyIdentifier
79:B4:59:E6:7B:B6:E5:E4:01:73:80:08:88:C8:1A:58:F6:E9:9B:6E
authorityInfoAccess
CA Issuers - URI:http://x1.i.lencr.org/
certificatePolicies
Policy: 2.23.140.1.2.1
crlDistributionPoints
Full Name: URI:http://x1.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.

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