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 baukontor-flensburg.de

Self-signed
Issued by (CA)
Plesk
Subject
Plesk
Valid from
Feb 12, 2026
Valid until
Feb 12, 2027 (196 days remaining)
Public key
RSA 2048-bit
Serial
698DCD38
SHA-256 fingerprint
D9:1A:7B:8E:53:03:D8:F9:A1:68:14:13:2F:7A:4C:2B:DB:92:0E:F4:CD:9C:74:F0:D6:B8:8E:56:1E:8C:DB:E0
Chain
Plesk

Certificate Authority Authorization (CAA)

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

Never get surprised by baukontor-flensburg.de's certificate expiring

This is today's certificate. Turn on monitoring and we'll watch baukontor-flensburg.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.