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

TLSv1.2

dns3.proen.co.th · 2400:ea00:c010:188:103:246:188:99:443

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=US ST=Someprovince L=Sometown O=none OU=none CN=localhost emailAddress=webmaster@localhost
Issuer
C=US ST=Someprovince L=Sometown O=none OU=none CN=localhost emailAddress=webmaster@localhost
Valid from
2022-05-23T02:40:26+00:00
Expires
2049-10-07T02:40:26+00:00
Days remaining
8397
Serial (hex)
920312D19E336227
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

3D:BB:F3:A8:5F:09:23:A8:EA:3A:BB:C6:A9:3F:DD:2B:73:1B:61:4C:26:82:EA:84:8E:6D:4E:B5:43:45:4B:4D
Certificate extensions & PEM
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: ECDHE-RSA-AES128-GCM-SHA256 · Checked 2026-10-10T18:06:26+00:00

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

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