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

mailx1.cognitiva.cloud · 38.100.207.23:443

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=-- ST=SomeState L=SomeCity O=SomeOrganization OU=SomeOrganizationalUnit CN=mailx1.cognitiva.cloud emailAddress=root@mailx1.cognitiva.cloud
Issuer
C=-- ST=SomeState L=SomeCity O=SomeOrganization OU=SomeOrganizationalUnit CN=mailx1.cognitiva.cloud emailAddress=root@mailx1.cognitiva.cloud
Valid from
2020-06-01T13:35:13+00:00
Expires
2021-06-01T13:35:13+00:00
Days remaining
-1984
Serial (hex)
1985
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

E5:3F:F5:79:BE:CD:EF:4D:C8:DB:FA:A6:7E:B9:92:97:76:68:D2:FD:19:3C:12:73:F2:6A:6D:EE:EE:1C:0D:7F
Certificate extensions & PEM
basicConstraints
CA:FALSE
keyUsage
Digital Signature, Non Repudiation, Key Encipherment
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: ECDHE-RSA-AES128-GCM-SHA256 · Checked 2026-11-06T11:47:40+00:00

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

View certificate JSON

Registration / WHOIS →DNS records →