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.fasthost.hk · 123.242.224.153:443

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

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
2026-06-05T07:57:51+00:00
Expires
2027-06-05T07:57:51+00:00
Days remaining
232
Serial (hex)
6A22817F
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

2A:B6:61:4C:10:D9:DE:C6:7B:52:11:4D:56:BB:E8:C0:2F:1F:36:1B:19:A8:F1:30:FC:57:F3:59:D9:27:E8:7D
Certificate extensions & PEM
extendedKeyUsage
TLS Web Server Authentication
subjectKeyIdentifier
19:65:51:99:DB:D6:B9:31:8B:0E:B2:40:45:96:6E:6B:12:7E:E2:BF
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: TLS_AES_128_GCM_SHA256 · Checked 2026-10-16T02:31:13+00:00

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

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