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 assmann-ch.com

Valid
Issued by (CA)
Let's Encrypt
Subject
assmann-ch.com
Valid from
Aug 15, 2026
Valid until
Nov 13, 2026 (43 days remaining)
Public key
EC 256-bit
Serial
050C5AA8D56FB1599B546DA4139997CE181D
SHA-256 fingerprint
1C:8B:FD:10:D8:2F:41:A4:D4:21:94:78:56:43:C9:BA:48:2A:A8:8B:04:D3:97:EA:80:B0:29:2B:29:50:C7:6E
Chain
YE2 → Root YE → ISRG Root X2 → ISRG Root X1
Subject Alternative Names (2)
assmann-ch.com, www.assmann-ch.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 Sep 24, 2026.

Never get surprised by assmann-ch.com's certificate expiring

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