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 wetter-arbon.ch

Valid
Issued by (CA)
Let's Encrypt
Subject
wetter-arbon.ch
Valid from
Jun 26, 2026
Valid until
Sep 24, 2026 (44 days remaining)
Public key
RSA 2048-bit
Serial
052E388F93E05BFCE9C6A3485683736C57B7
SHA-256 fingerprint
EF:6D:83:A6:B0:BE:D6:C9:AB:49:DA:C8:F5:B1:4F:35:A1:85:EC:DC:9F:9D:0F:4A:70:85:68:E0:84:F5:85:D2
Chain
YR2 → Root YR → ISRG Root X1
Subject Alternative Names (1)
wetter-arbon.ch

Certificate Authority Authorization (CAA)

The serving CA (Let's Encrypt) is authorized by this domain's CAA records (globalsign.com, letsencrypt.org).

Never get surprised by wetter-arbon.ch's certificate expiring

This is today's certificate. Turn on monitoring and we'll watch wetter-arbon.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.