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 fiz-kiel.de

Valid
Issued by (CA)
Sectigo Limited
Subject
fiz-kiel.de
Valid from
Sep 18, 2026
Valid until
Apr 4, 2027 (148 days remaining)
Public key
RSA 2048-bit
Serial
AB8E8E93E01B943C79C5C7EF4DC26B46
SHA-256 fingerprint
E0:7B:4B:AF:D1:74:DC:01:6F:42:5B:A5:94:66:52:81:B1:C9:FE:A7:84:F4:C1:9B:7E:32:8A:70:2A:D8:17:62
Chain
Sectigo Public Server Authentication CA DV R36 → Sectigo Public Server Authentication Root R46 → USERTrust RSA Certification Authority
Subject Alternative Names (2)
fiz-kiel.de, www.fiz-kiel.de

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 Oct 5, 2026.

Never get surprised by fiz-kiel.de's certificate expiring

This is today's certificate. Turn on monitoring and we'll watch fiz-kiel.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.