SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
bt-center.de
SSL/TLS Certificate
SSL/TLS Certificate for bt-center.de
Valid- Issued by (CA)
- ZeroSSL GmbH
- Subject
- bt-center.de
- Valid from
- Jul 21, 2026
- Valid until
- Oct 19, 2026 (81 days remaining)
- Public key
- EC 256-bit
- Serial
- 62B5F70269CE44092398FE423B219D55
- SHA-256 fingerprint
- 9D:F1:54:68:05:A5:C9:91:45:E5:9D:31:85:AA:C4:D2:6B:79:63:18:1D:CD:C0:DD:1E:36:1C:CF:93:D1:FC:A3
- Chain
- ZeroSSL ECC DV SSL CA 2 → Sectigo Public Server Authentication Root E46 → USERTrust ECC Certification Authority
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
Never get surprised by bt-center.de's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch bt-center.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.
Free for your first domain: uptime, DNS, and certificate together. No credit card.