SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
bwtec-gruppe.de
SSL/TLS Certificate
SSL/TLS Certificate for bwtec-gruppe.de
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- bwtec-gruppe.de
- Valid from
- Oct 12, 2026
- Valid until
- Jan 10, 2027 (58 days remaining)
- Public key
- RSA 4096-bit
- Serial
- 066ADBCEFD312131B939D4CD453F66DE9B6B
- SHA-256 fingerprint
- 79:4C:20:55:3F:32:CC:C8:B3:AE:AD:11:4C:31:37:F9:92:E9:03:F0:D8:DB:5D:C3:E7:D3:F8:27:56:41:AE:75
- Chain
- YR1 → Root YR → ISRG Root X1
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
We've observed 1 previous certificate for this host. This certificate has been served since Sep 25, 2026.
Never get surprised by bwtec-gruppe.de's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch bwtec-gruppe.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, 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.
Free for your first domain: uptime, DNS, and certificate together. No credit card.