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

mail.aemnet.it · 89.184.100.4:443

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
CN=NethServer O=Example Org ST=SomeState OU=Main emailAddress=root@localhost.localdomain C=-- L=Hometown
Issuer
CN=NethServer O=Example Org ST=SomeState OU=Main emailAddress=root@localhost.localdomain C=-- L=Hometown
Valid from
2010-11-17T01:02:06+00:00
Expires
2020-11-14T01:02:06+00:00
Days remaining
-2174
Serial (hex)
4CE3298E
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

B9:BE:2A:D2:A9:5C:78:40:5D:79:41:18:0B:A6:A0:1F:DF:78:CF:A6:A5:FE:EE:A3:AE:57:A5:F2:D4:21:32:FC
Certificate extensions & PEM
subjectKeyIdentifier
C4:AB:C0:4A:74:9C:7F:EB:F8:42:66:F2:0D:0E:16:3E:18:BF:4E:6D
authorityKeyIdentifier
C4:AB:C0:4A:74:9C:7F:EB:F8:42:66:F2:0D:0E:16:3E:18:BF:4E:6D
basicConstraints
CA:TRUE
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: ECDHE-RSA-AES256-GCM-SHA384 · Checked 2026-10-27T02:44:29+00:00

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

View certificate JSON

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