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 kt-hs.se
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- *.kt-hs.se
- Valid from
- May 29, 2026
- Valid until
- Aug 27, 2026 (30 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 05DB146267A7A0B5828ED7FFBA21E28592A5
- SHA-256 fingerprint
- DB:D1:0D:9F:01:4F:31:C7:9B:55:FB:6A:79:CC:41:92:FF:4B:03:35:2D:37:B7:F6:95:B8:E4:3E:13:A3:D2:6B
- Chain
- YR2 → Root YR → 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 Jul 21, 2026.
Never get surprised by kt-hs.se's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch kt-hs.se 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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