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.zhukovsky.net · 77.232.152.12:443

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
C=US ST=California L=Santa Barbara O=Apache HTTP Server OU=For Testing Purposes Only CN=localhost emailAddress=root@localhost
Issuer
C=US ST=California L=Santa Barbara O=Apache HTTP Server OU=For Testing Purposes Only CN=localhost CA emailAddress=root@localhost
Valid from
2012-02-07T07:49:07+00:00
Expires
2014-02-06T07:49:07+00:00
Days remaining
-4620
Serial (hex)
02
Signature
RSA-SHA1
Public key
RSA 1024

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

E7:2E:42:AC:2D:ED:6D:01:31:20:93:EB:A3:E8:51:FD:2F:5D:72:B8:08:D2:2C:F3:32:57:64:7D:F9:AD:3B:A1
Certificate extensions & PEM
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: ECDHE-RSA-AES128-GCM-SHA256 · Checked 2026-10-01T04:57:39+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 →