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 haase-architekt.de

Valid
Issued by (CA)
Sectigo Limited
Subject
*.haase-architekt.de
Valid from
Mar 29, 2026
Valid until
Oct 9, 2026 (74 days remaining)
Public key
RSA 2048-bit
Serial
D947704725818296903724C603B59E1A
SHA-256 fingerprint
31:65:3F:59:F3:5E:0C:11:F3:CB:AD:77:6C:A9:7B:D6:67:7F:A7:01:BB:74:45:9B:B3:DB:16:57:E3:6B:BD:DC
Chain
Sectigo Public Server Authentication CA DV R36 → Sectigo Public Server Authentication Root R46 → USERTrust RSA Certification Authority
Subject Alternative Names (2)
*.haase-architekt.de, haase-architekt.de

Certificate Authority Authorization (CAA)

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

Never get surprised by haase-architekt.de's certificate expiring

This is today's certificate. Turn on monitoring and we'll watch haase-architekt.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.