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 sis-maennedorf.ch

Valid
Issued by (CA)
Let's Encrypt
Subject
sis-allschwil.ch
Valid from
Sep 25, 2026
Valid until
Dec 24, 2026 (52 days remaining)
Public key
RSA 4096-bit
Serial
06A340405ED265F6C10D6F574DDD70AA5151
SHA-256 fingerprint
4C:3C:2E:E9:AF:87:C4:EA:BF:87:98:B4:35:2F:F4:31:81:A5:01:7B:10:80:CE:20:24:B1:51:8C:EF:97:C2:57
Chain
YR1 → Root YR → ISRG Root X1
Subject Alternative Names (18)
sis-allschwil.ch, sis-basel.ch, sis-maennedorf.ch, sis-pfaeffikon.ch, sis-rotkreuz.ch, sis-schoenenwerd.ch, sis-winterthur.ch, sis-wollishofen.ch, sis-zuerich.ch, www.sis-allschwil.ch, www.sis-basel.ch, www.sis-maennedorf.ch, www.sis-pfaeffikon.ch, www.sis-rotkreuz.ch, www.sis-schoenenwerd.ch, www.sis-winterthur.ch, www.sis-wollishofen.ch, www.sis-zuerich.ch

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 1, 2026.

Never get surprised by sis-maennedorf.ch's certificate expiring

This is today's certificate. Turn on monitoring and we'll watch sis-maennedorf.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.