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 smsp.net.au

Expired
Issued by (CA)
COMODO CA Limited
Subject
smsp.net.au
Valid from
Aug 1, 2017
Valid until
Aug 31, 2018 (expired 2923 days ago)
Public key
RSA 2048-bit
Serial
F7888C0B372781E347CD5BE30A151858
SHA-256 fingerprint
56:1C:18:A6:8C:4B:46:E7:79:73:4A:05:ED:80:08:8B:ED:5F:62:7D:14:A3:66:60:68:40:B8:91:1B:E6:52:D2
Chain
COMODO RSA Domain Validation Secure Server CA → COMODO RSA Certification Authority
Subject Alternative Names (2)
smsp.net.au, www.smsp.net.au

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 23, 2026.

Never get surprised by smsp.net.au's certificate expiring

This is today's certificate. Turn on monitoring and we'll watch smsp.net.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.