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 un-gateau.com

Valid
Issued by (CA)
Let's Encrypt
Subject
www.un-gateau.com
Valid from
Sep 21, 2026
Valid until
Dec 20, 2026 (63 days remaining)
Public key
EC 256-bit
Serial
05E0DEBB14F51F2165E931E2DE802664D749
SHA-256 fingerprint
34:32:F1:22:F7:76:AA:65:E1:97:8A:30:3E:0F:6D:B8:F1:12:70:74:C7:47:C6:2E:88:B5:C1:6D:03:44:49:01
Chain
YE2 → Root YE → ISRG Root X2 → ISRG Root X1
Subject Alternative Names (2)
un-gateau.com, www.un-gateau.com

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 Oct 5, 2026.

Never get surprised by un-gateau.com's certificate expiring

This is today's certificate. Turn on monitoring and we'll watch un-gateau.com 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.