SSL/TLS Certificate Lookup

Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted

SSL/TLS Certificate for cgs.id.au

Self-signed
Issued by (CA)
CP-WH-102
Subject
CP-WH-102
Valid from
Aug 31, 2023
Valid until
Aug 30, 2024 (expired 710 days ago)
Public key
RSA 4096-bit
Serial
5B52FBDD1015FA33407214E79B9C9CBD6EA78971
SHA-256 fingerprint
73:D9:64:7B:2B:9E:ED:59:C0:BF:3D:92:69:5C:71:37:97:AF:51:AC:F8:EE:EF:D6:3F:FE:5A:74:32:80:9B:F0
Chain
CP-WH-102

Certificate Authority Authorization (CAA)

No CAA policy is published for this domain — any certificate authority may issue for it.

This certificate has been served since Aug 2, 2026.

Never get surprised by cgs.id.au's certificate expiring

This is today's certificate. Turn on monitoring and we'll watch cgs.id.au continuously, notifying you the moment anything moves across all three signals:

Uptime

We visit the site from multiple regions worldwide and email you within minutes if it goes down, with a per-region breakdown so a real outage stands out from a regional blip.

DNS changes

We watch NS, MX, CAA, DNSSEC, CNAME and A/AAAA records, and identify the host, network, and ASN behind them, so a real migration or hijack stands out from routine noise.

TLS certificate

We warn you 30, 14, 7, and 1 days before it expires, and flag it if the issuing authority changes or the certificate is unexpectedly replaced.

Monitor this certificate free

Free for your first domain: uptime, DNS, and certificate together. No credit card.