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.hl.cn · 156.236.113.3:443

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
The certificate has expired.

Certificate verification failed

Subject
CN=hk4-2.laoxuehost.com
Issuer
CN=hk4-2.laoxuehost.com
Valid from
2023-10-04T02:30:57+00:00
Expires
2024-10-03T02:30:57+00:00
Days remaining
-734
Serial (hex)
3330A3F9
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

DNS:hk4-2.laoxuehost.com, DNS:mail.hk4-2.laoxuehost.com, DNS:www.hk4-2.laoxuehost.com, DNS:cpanel.hk4-2.laoxuehost.com, DNS:webmail.hk4-2.laoxuehost.com, DNS:webdisk.hk4-2.laoxuehost.com, DNS:cpcontacts.hk4-2.laoxuehost.com, DNS:cpcalendars.hk4-2.laoxuehost.com, DNS:whm.hk4-2.laoxuehost.com

SHA-256 fingerprint

CA:7D:8C:2C:5E:46:EC:8B:6E:FD:32:1F:F0:01:71:A8:50:8F:AE:ED:C8:60:C9:B0:B4:6E:18:21:AC:CC:ED:5A
Certificate extensions & PEM
subjectKeyIdentifier
93:18:C6:AF:07:E9:BC:D7:42:43:EC:D3:86:0B:A5:1B:60:A1:75:AF
basicConstraints
CA:FALSE
authorityKeyIdentifier
keyid:93:18:C6:AF:07:E9:BC:D7:42:43:EC:D3:86:0B:A5:1B:60:A1:75:AF DirName:/CN=hk4-2.laoxuehost.com serial:33:30:A3:F9
extendedKeyUsage
TLS Web Server Authentication, TLS Web Client Authentication
subjectAltName
DNS:hk4-2.laoxuehost.com, DNS:mail.hk4-2.laoxuehost.com, DNS:www.hk4-2.laoxuehost.com, DNS:cpanel.hk4-2.laoxuehost.com, DNS:webmail.hk4-2.laoxuehost.com, DNS:webdisk.hk4-2.laoxuehost.com, DNS:cpcontacts.hk4-2.laoxuehost.com, DNS:cpcalendars.hk4-2.laoxuehost.com, DNS:whm.hk4-2.laoxuehost.com
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: TLS_AES_128_GCM_SHA256 · Checked 2026-10-06T07:09:55+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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