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 gert-richter.com

Valid
Issued by (CA)
Let's Encrypt
Subject
gert-richter.com
Valid from
Aug 12, 2026
Valid until
Nov 10, 2026 (34 days remaining)
Public key
RSA 2048-bit
Serial
05E6F42748FE01DD6E9AC87CF413505497A2
SHA-256 fingerprint
A1:A3:EC:9A:FE:E1:78:EC:8F:72:C2:E5:25:82:FB:D2:FD:56:D2:B0:DF:70:26:73:6A:A9:3E:AD:51:7B:5E:2B
Chain
YR2 → Root YR → ISRG Root X1
Subject Alternative Names (4)
gert-richter.com, mail.gert-richter.com, webmail.gert-richter.com, www.gert-richter.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 20, 2026.

Never get surprised by gert-richter.com's certificate expiring

This is today's certificate. Turn on monitoring and we'll watch gert-richter.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.