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

dns3.umich.mx · 148.216.255.2:443

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=HK CN=SMB
Issuer
C=HK CN=SMB
Valid from
2019-01-01T08:01:13+00:00
Expires
2038-12-27T08:01:13+00:00
Days remaining
4436
Serial (hex)
CE491C9A0FF88F17
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

EE:73:F3:BC:EB:97:F7:DC:4F:79:31:98:C4:35:AF:D9:7A:95:99:24:CF:3D:15:D8:A4:28:72:FD:5B:99:8E:6C
Certificate extensions & PEM
subjectKeyIdentifier
2A:8C:83:DC:90:5F:75:CE:C8:69:54:21:89:F5:06:77:99:3F:69:39
authorityKeyIdentifier
2A:8C:83:DC:90:5F:75:CE:C8:69:54:21:89:F5:06:77:99:3F:69:39
basicConstraints
CA:TRUE
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: ECDHE-RSA-AES128-GCM-SHA256 · Checked 2026-11-04T04:38:34+00:00

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

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