SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
kh-htk.de
SSL/TLS Certificate
SSL/TLS Certificate for kh-htk.de
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- kh-htk.de
- Valid from
- Jul 16, 2026
- Valid until
- Oct 14, 2026 (65 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 0573FA1EC25FE109E784504280C51F6EC599
- SHA-256 fingerprint
- 8E:24:9C:DD:46:67:E7:A3:A6:72:70:4A:71:EA:BF:F9:4E:D0:AA:8D:87:D1:39:21:2C:90:DC:20:44:EA:B2:6E
- 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.
Never get surprised by kh-htk.de's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch kh-htk.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.
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