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 it-sk.at
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- it-sk.at
- Valid from
- Aug 14, 2026
- Valid until
- Nov 12, 2026 (43 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 06720D4AB3A372552491F609A06589ADC31C
- SHA-256 fingerprint
- 4E:F6:EB:F9:97:51:30:7F:3E:E5:15:30:C1:F4:63:C5:43:FD:89:76:8B:D1:DD:E5:C1:92:F9:67:CB:74:36:AE
- 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.
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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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