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 ssl-labs.pt

Valid
Issued by (CA)
Google Trust Services
Subject
ssl-labs.pt
Valid from
Jul 18, 2026
Valid until
Oct 16, 2026 (79 days remaining)
Public key
EC 256-bit
Serial
4CDF957214EB744B0E92B475320C96F1
SHA-256 fingerprint
38:F6:81:A6:A0:2F:11:9F:F2:31:CD:C9:04:66:78:73:8E:66:A5:44:65:BD:7D:77:F3:48:51:48:B7:34:EB:7F
Chain
WE1 → GTS Root R4
Subject Alternative Names (2)
*.ssl-labs.pt, ssl-labs.pt

Certificate Authority Authorization (CAA)

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

Never get surprised by ssl-labs.pt's certificate expiring

This is today's certificate. Turn on monitoring and we'll watch ssl-labs.pt 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.