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 dortmann-dental.de

Valid
Issued by (CA)
Let's Encrypt
Subject
dortmann-dental.de
Valid from
Nov 6, 2026
Valid until
Feb 4, 2027 (83 days remaining)
Public key
RSA 2048-bit
Serial
0686D4AEBBB883429DE4BBBA07749DB42A5E
SHA-256 fingerprint
0E:E9:CB:2D:76:1D:33:69:73:A3:5F:2F:A7:32:2D:11:02:9A:F4:9D:FE:DC:D0:52:3A:BF:24:F9:67:4B:16:94
Chain
YR2 → Root YR → ISRG Root X1
Subject Alternative Names (2)
*.dortmann-dental.de, dortmann-dental.de

Certificate Authority Authorization (CAA)

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

We've observed 1 previous certificate for this host. This certificate has been served since Sep 20, 2026.

Never get surprised by dortmann-dental.de's certificate expiring

This is today's certificate. Turn on monitoring and we'll watch dortmann-dental.de 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.