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 kit-s.at
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- www.kit-s.at
- Valid from
- Aug 24, 2026
- Valid until
- Nov 22, 2026 (70 days remaining)
- Public key
- EC 256-bit
- Serial
- 057BF0DBBF5AD78121AA14B780F136596580
- SHA-256 fingerprint
- 9C:1C:39:76:47:5A:C2:6B:BD:DB:B6:C8:CF:CA:E7:BD:C6:9A:27:FF:F9:7F:D2:A6:17:28:D6:05:FE:5C:5D:53
- Chain
- YE2 → 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.
Never get surprised by kit-s.at's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch kit-s.at 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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