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.ddtsa.com · 142.202.136.33:443

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
2023-10-08T19:25:12+00:00
Expires
2024-10-07T19:25:12+00:00
Days remaining
-758
Serial (hex)
65230218
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

7A:CF:10:64:AB:A8:67:AD:D9:A7:44:08:41:48:C1:80:D4:41:D4:63:9A:33:77:E5:96:C2:06:19:16:57:28:1B
Certificate extensions & PEM
extendedKeyUsage
TLS Web Server Authentication
-----BEGIN CERTIFICATE-----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=
-----END CERTIFICATE-----

Cipher: TLS_AES_256_GCM_SHA384 · Checked 2026-11-04T09:58:57+00:00

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

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