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 km-it.de

Expired
Issued by (CA)
Let's Encrypt
Subject
km-it.de
Valid from
Aug 13, 2016
Valid until
Nov 11, 2016 (expired 3648 days ago)
Public key
RSA 2048-bit
Serial
03462BCE4CC6284F9FB45A883EC16D557C7E
SHA-256 fingerprint
D8:E2:23:99:E9:37:21:EF:DB:56:9B:18:C4:BF:81:C2:41:30:68:D6:04:16:6F:FE:56:7F:45:58:0D:18:41:C7
Chain
Let's Encrypt Authority X3
Subject Alternative Names (1)
km-it.de

Certificate Authority Authorization (CAA)

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

Never get surprised by km-it.de's certificate expiring

This is today's certificate. Turn on monitoring and we'll watch km-it.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.