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 heitec-gmbh.de

Expired
Issued by (CA)
Let's Encrypt
Subject
heitec-gmbh.de
Valid from
Apr 23, 2026
Valid until
Jul 22, 2026 (expired 8 days ago)
Public key
RSA 4096-bit
Serial
050E0BF593106E0120FF99AC20EDB97D5F99
SHA-256 fingerprint
F1:1A:BD:FD:73:08:27:FD:BD:27:AF:A6:22:C0:4E:D5:71:70:FE:4B:B1:AB:2F:9E:DD:EE:2B:6E:15:1C:2E:46
Chain
R12 → ISRG Root X1
Subject Alternative Names (1)
heitec-gmbh.de

Certificate Authority Authorization (CAA)

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

Never get surprised by heitec-gmbh.de's certificate expiring

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