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

ns4.leonix.fr · 51.15.223.200:443

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=TRAEFIK DEFAULT CERT
Issuer
CN=TRAEFIK DEFAULT CERT
Valid from
2026-10-16T10:29:39+00:00
Expires
2027-10-16T10:29:39+00:00
Days remaining
363
Serial (hex)
589A88CCC31D7F50A3A67DBFBDBD184D
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

DNS:5c4b4b3c5d1c6ef5d7deb8f13c2b8388.0497947ed30c135d387db7acd6f03ea8.traefik.default

SHA-256 fingerprint

D4:7A:89:32:62:67:73:63:8E:D6:E9:48:4E:EF:F7:8B:9E:C3:73:3B:C6:03:7D:EE:E2:7F:30:02:F0:A3:37:5C
Certificate extensions & PEM
keyUsage
Digital Signature, Key Encipherment, Data Encipherment, Key Agreement
extendedKeyUsage
TLS Web Server Authentication
basicConstraints
CA:FALSE
subjectAltName
DNS:5c4b4b3c5d1c6ef5d7deb8f13c2b8388.0497947ed30c135d387db7acd6f03ea8.traefik.default
-----BEGIN CERTIFICATE-----
MIIDXTCCAkWgAwIBAgIQWJqIzMMdf1Cjpn2/vb0YTTANBgkqhkiG9w0BAQsFADAf
MR0wGwYDVQQDExRUUkFFRklLIERFRkFVTFQgQ0VSVDAeFw0yNjEwMTYxMDI5Mzla
Fw0yNzEwMTYxMDI5MzlaMB8xHTAbBgNVBAMTFFRSQUVGSUsgREVGQVVMVCBDRVJU
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAunE67FDvWsUrGGQnlTHk
n0nrfptwFH2uQhljk1+uxtqfuQfQ4xuy907Lm6U0L4fL7i09IBvB7Ew5vriq64rQ
RV2SFNwL1wLSlkPQqaQE523J9Mznd8dt9bOd7PPzt8kypSZX8BqLngV5hmGNQjrO
QwmrVJPkwBTfsA/zqHhSwfahj3n9mJ5R7FlNQOAHxfMschyq89qsgrpOnINAgMH2
E3OpYvRvyfeG3+jKazIUM4PG49UIjgPvsm6Vh2HZvUbv6LJ2vUWCX9JvD02f43CO
Tkq0fTeFSS/pPggmezgPWeMwHY73buGN2pkTrDbJwRUC8w/cxP4RLC36MTB93JLj
YQIDAQABo4GUMIGRMA4GA1UdDwEB/wQEAwIDuDATBgNVHSUEDDAKBggrBgEFBQcD
ATAMBgNVHRMBAf8EAjAAMFwGA1UdEQRVMFOCUTVjNGI0YjNjNWQxYzZlZjVkN2Rl
YjhmMTNjMmI4Mzg4LjA0OTc5NDdlZDMwYzEzNWQzODdkYjdhY2Q2ZjAzZWE4LnRy
YWVmaWsuZGVmYXVsdDANBgkqhkiG9w0BAQsFAAOCAQEANhqYjmrglLhzXzJAGj3j
mrb510VtQ1SZj2WcU0PAEXCvYqwUetV1ypPx8W0s2k+szApHug3Wd4a7e4qtTs+7
mwjrt40MtO9B4D3bsNFt6HHmPQe738Ocyz9BWD7FGlP9b8HZo5+oANq2KPjxdm/Q
F1U8cIeOqX1U4teNzCZ3c768/T55teWkcva7SIqisaTrTBlOLh/Exuqrq7Gppn9D
Dnfp+XB/0642+z155aqZf3dnutcW7XxSsHqidl7kITUa40cN0sS2LGmSaIfbtdpp
BPjUTvlBdB6y6wtuZKYTd59keWulMlC+MieD+i+DQJ4n29Gr/w9GYS19uFJ0gBnM
Yw==
-----END CERTIFICATE-----

Cipher: TLS_AES_128_GCM_SHA256 · Checked 2026-10-18T01:56:06+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 →