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 asbu.de
Untrusted chain- Issued by (CA)
- Let's Encrypt
- Subject
- asbu.de
- Valid from
- Aug 11, 2026
- Valid until
- Nov 9, 2026 (88 days remaining)
- Public key
- EC 256-bit
- Serial
- 05540C141EE788FA334AC1E4A303E46078EE
- SHA-256 fingerprint
- BC:C2:D8:AE:8C:1B:01:4E:E3:E7:23:DA:6E:EF:1C:7B:0E:61:52:A1:12:B5:DB:20:F8:2D:32:56:98:81:53:D2
- Chain
- —
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
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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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