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

mail.aragon.net · 194.143.194.237:443

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
2024-05-03T09:47:18+00:00
Expires
2025-05-03T09:47:18+00:00
Days remaining
-529
Serial (hex)
6634B2A5
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

47:8B:3B:18:9F:01:FE:1E:25:EB:74:A6:DA:D3:06:DD:E0:34:FA:15:2C:59:DA:6C:DE:1C:D2:34:43:A2:F5:CC
Certificate extensions & PEM
extendedKeyUsage
TLS Web Server Authentication
subjectKeyIdentifier
AC:A7:F6:0A:87:EE:FD:47:D6:E6:86:C7:5E:DF:38:05:4C:38:A1:68
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: TLS_AES_256_GCM_SHA384 · Checked 2026-10-13T16:15:13+00:00

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

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