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

ns.core-hosting.eu · 5.253.176.3:443

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
CN=localhost
Issuer
CN=localhost
Valid from
2020-09-18T19:33:01+00:00
Expires
2030-09-16T19:33:01+00:00
Days remaining
1430
Serial (hex)
EB6FE6842419B363
Signature
RSA-SHA256
Public key
RSA 1024

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

5B:D6:4C:62:6D:D7:2B:6F:5E:53:90:84:40:C6:D9:0F:E6:DE:A8:1B:99:F2:4D:79:BC:B8:FA:F2:F6:67:99:9A
Certificate extensions & PEM
basicConstraints
CA:TRUE
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: ECDHE-RSA-AES128-GCM-SHA256 · Checked 2026-10-17T11:16:19+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 →