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.ns4.parsdev.net · 5.61.27.27:443

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
2021-01-14T19:28:56+00:00
Expires
2048-05-31T19:28:56+00:00
Days remaining
7878
Serial (hex)
3161977E861555963F51194FE1FD48E2525D4231
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

71:26:3F:C2:71:A1:4C:93:EC:AA:14:FC:BE:3D:DD:32:1D:B1:38:74:08:D4:04:5B:2E:49:02:A9:AB:E1:92:62
Certificate extensions & PEM
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: TLS_AES_256_GCM_SHA384 · Checked 2026-11-05T02:10:45+00:00

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

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