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-sa.at
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- it-sa.at
- Valid from
- Oct 8, 2026
- Valid until
- Jan 6, 2027 (62 days remaining)
- Public key
- EC 256-bit
- Serial
- 052FB7AF08CB7FB49CD6159AEF4071044123
- SHA-256 fingerprint
- 2D:35:6D:2F:41:B6:5B:73:8E:CC:9E:C8:59:06:50:1D:EE:F4:58:D9:DA:24:22:FF:BC:3C:49:F8:E8:37:A1:85
- Chain
- YE1 → 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.
This certificate has been served since Oct 18, 2026.
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This is today's certificate. Turn on monitoring and we'll watch it-sa.at continuously, notifying you the moment anything moves across all three signals:
Uptime
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DNS changes
We watch NS, MX, CAA, CNAME, TXT 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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