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.verkut.su · 5.231.203.3:443

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=verkut-agent
Issuer
CN=verkut-agent
Valid from
2026-10-28T23:55:57+00:00
Expires
2036-10-25T23:55:57+00:00
Days remaining
3637
Serial (hex)
0345299C0E159D621DE9DEDE3EF62374716E7AD3
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

IP Address:5.231.203.3, DNS:mail.verkut.su

SHA-256 fingerprint

D2:54:8D:B8:64:9A:12:36:0E:6E:10:4A:60:C4:03:7E:6B:1F:51:99:16:98:17:30:A7:3C:1B:D6:E8:D9:83:46
Certificate extensions & PEM
subjectKeyIdentifier
27:4A:BD:88:90:58:C2:A0:07:1A:A4:88:F3:BA:7F:45:3D:6D:D0:D7
authorityKeyIdentifier
27:4A:BD:88:90:58:C2:A0:07:1A:A4:88:F3:BA:7F:45:3D:6D:D0:D7
basicConstraints
CA:TRUE
subjectAltName
IP Address:5.231.203.3, DNS:mail.verkut.su
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: TLS_AES_256_GCM_SHA384 · Checked 2026-11-10T01:21:36+00:00

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

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