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 bu-an.de

Hostname mismatch
Issued by (CA)
GlobalSign nv-sa
Subject
*.websale.net
Valid from
Dec 22, 2025
Valid until
Jan 23, 2027 (124 days remaining)
Public key
RSA 2048-bit
Serial
6542FB40B63983EDCDF5D75D
SHA-256 fingerprint
A9:8E:36:09:CA:12:2A:45:FE:46:21:BE:F5:EF:2A:44:BB:93:7D:6C:79:EB:E3:3C:90:1E:39:1C:DD:94:50:31
Chain
GlobalSign GCC R6 AlphaSSL CA 2025 → GlobalSign
Subject Alternative Names (2)
*.websale.net, websale.net

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 Sep 8, 2026.

Never get surprised by bu-an.de's certificate expiring

This is today's certificate. Turn on monitoring and we'll watch bu-an.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.