SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
bau-sub.net
SSL/TLS Certificate
SSL/TLS Certificate for bau-sub.net
Expiring soon- Issued by (CA)
- Let's Encrypt
- Subject
- www.bau-sub.de
- Valid from
- Aug 11, 2026
- Valid until
- Nov 9, 2026 (21 days remaining)
- Public key
- EC 384-bit
- Serial
- 05ABC1392C73D7E1E250AADA8ACDC42F4EFE
- SHA-256 fingerprint
- ED:C2:70:C1:8D:DF:3C:97:23:03:9C:E4:AB:1D:24:DC:34:7B:E1:51:96:AD:22:27:08:D6:AB:FD:D2:38:11:D8
- Chain
- YE1 → Root YE → ISRG Root X2 → ISRG Root X1
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 20, 2026.
Never get surprised by bau-sub.net's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch bau-sub.net 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.