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

mail.exoon.ca · 155.254.212.183:443

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=US ST=Someprovince L=Sometown O=none OU=none CN=localhost emailAddress=webmaster@localhost
Issuer
C=US ST=Someprovince L=Sometown O=none OU=none CN=localhost emailAddress=webmaster@localhost
Valid from
2021-10-28T15:43:41+00:00
Expires
2049-03-14T15:43:41+00:00
Days remaining
8157
Serial (hex)
96C23B653B0034AB
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

A5:75:1F:8F:AA:C3:50:42:EA:78:09:5A:1F:1C:74:B6:87:99:A4:47:D8:12:D5:A0:78:B1:63:B9:9F:70:53:2A
Certificate extensions & PEM
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: ECDHE-RSA-AES128-GCM-SHA256 · Checked 2026-11-12T21:25:21+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 →