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 vat.ch

Expired
Issued by (CA)
Let's Encrypt
Subject
vatvalve.biz
Valid from
Nov 20, 2025
Valid until
Feb 18, 2026 (expired 161 days ago)
Public key
RSA 2048-bit
Serial
06F0F268A20C1BBB496AF28DA76D90C1F68F
SHA-256 fingerprint
2B:AF:6C:65:71:D1:DF:91:24:08:C8:DD:06:9E:85:91:46:2B:8D:0C:AA:0D:AA:E7:4F:21:4C:A2:0C:2D:2B:AA
Chain
R13 → ISRG Root X1
Subject Alternative Names (3)
vatvalve.biz, www.vat.ch, www.vatvalve.biz

Certificate Authority Authorization (CAA)

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

Never get surprised by vat.ch's certificate expiring

This is today's certificate. Turn on monitoring and we'll watch vat.ch 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.