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.bursabil.com.tr · 185.26.144.44:443

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
O=DirectAdmin Self-Signed CN=is1.burdns.com
Issuer
O=DirectAdmin Self-Signed CN=is1.burdns.com
Valid from
2025-08-15T21:42:53+00:00
Expires
2035-08-15T21:42:53+00:00
Days remaining
3242
Serial (hex)
185C0EC0372FDE57
Signature
ecdsa-with-SHA384
Public key
EC 384 secp384r1

Subject alternative names (SAN)

DNS:is1.burdns.com, DNS:localhost

SHA-256 fingerprint

92:E4:2D:C3:1C:DF:4B:F5:ED:2A:9B:CE:AC:EE:77:C4:65:8A:D2:FD:85:CD:C4:F4:C2:82:1A:A7:86:D0:90:DD
Certificate extensions & PEM
keyUsage
Digital Signature, Certificate Sign
extendedKeyUsage
TLS Web Server Authentication
basicConstraints
CA:TRUE
subjectKeyIdentifier
27:37:80:E2:06:71:18:4E:47:3C:7C:6E:76:14:77:92:8A:69:C5:4E
subjectAltName
DNS:is1.burdns.com, DNS:localhost
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: TLS_AES_128_GCM_SHA256 · Checked 2026-09-29T16:31:36+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 →