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 sp-sarganserland.ch

Valid
Issued by (CA)
Let's Encrypt
Subject
sp-sarganserland.ch
Valid from
Oct 27, 2026
Valid until
Jan 25, 2027 (76 days remaining)
Public key
RSA 4096-bit
Serial
058212257A8418B1594E5B1959EF6F9ADFB5
SHA-256 fingerprint
9E:65:04:4D:C0:BE:41:FA:AD:C0:31:6C:DD:E9:9A:BD:40:72:D9:41:8D:26:FB:74:09:96:97:34:08:2A:CC:5E
Chain
YR2 → Root YR → ISRG Root X1
Subject Alternative Names (2)
sp-sarganserland.ch, www.sp-sarganserland.ch

Certificate Authority Authorization (CAA)

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

Never get surprised by sp-sarganserland.ch's certificate expiring

This is today's certificate. Turn on monitoring and we'll watch sp-sarganserland.ch continuously, notifying you the moment anything moves across all three signals:

Certificate monitor showing the issuer, expiry date, chain status, fingerprint, covered names, and a history of a rotation and an expiry warning

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, CNAME, TXT 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.