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

syan.nl · 185.85.17.248:443

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 L=Schaffhausen O=Plesk CN=Plesk emailAddress=info@plesk.com
Issuer
C=CH L=Schaffhausen O=Plesk CN=Plesk emailAddress=info@plesk.com
Valid from
2017-07-06T07:28:30+00:00
Expires
2018-07-06T07:28:30+00:00
Days remaining
-3045
Serial (hex)
595DE69E
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

96:22:E9:F3:54:D6:81:89:52:92:6E:D4:2A:B3:29:0F:82:A0:A8:6A:B2:D7:07:F0:63:F9:5A:FA:62:AA:3D:6A
Certificate extensions & PEM
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: TLS_AES_256_GCM_SHA384 · Checked 2026-11-05T07:55:14+00:00

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

View certificate JSON

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