SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
bau-um.com
SSL/TLS Certificate
SSL/TLS Certificate for bau-um.com
Hostname mismatch- Issued by (CA)
- Let's Encrypt
- Subject
- serv6.barum.de
- Valid from
- Jul 1, 2026
- Valid until
- Sep 29, 2026 (67 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 05E6B982D656F524210F432165855E0C8D5D
- SHA-256 fingerprint
- DC:57:9C:5B:AB:9E:9E:05:1B:4D:6E:16:8F:6A:AD:F7:29:48:35:AA:A8:1A:06:80:D2:33:A3:8E:81:89:99:21
- 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.
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This is today's certificate. Turn on monitoring and we'll watch bau-um.com continuously, notifying you the moment anything moves across all three signals:
Uptime
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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.
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