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

dns2.abc4it.com · 193.104.167.183:443

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
The certificate has expired.

Certificate verification failed

Subject
C=CH ST=Zuerich L=Waedenswil O=abc4IT GmbH OU=Internet Division CN=abc4it.com emailAddress=admin@abc4it.com
Issuer
C=CH ST=Zuerich L=Waedenswil O=abc4IT GmbH OU=Internet Division CN=abc4it.com emailAddress=admin@abc4it.com
Valid from
2011-11-01T13:15:57+00:00
Expires
2012-10-31T13:15:57+00:00
Days remaining
-5082
Serial (hex)
4EAFF10D
Signature
RSA-SHA1
Public key
RSA 1024

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

A9:D5:CC:68:04:58:76:A9:A7:FC:0C:35:30:3D:B8:24:02:E1:A2:1B:FC:C2:2E:C4:48:8D:BD:90:1B:B5:9E:20
Certificate extensions & PEM
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: TLS_AES_256_GCM_SHA384 · Checked 2026-09-30T11:37:11+00:00

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

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