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-c.ch
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- it-c.ch
- Valid from
- Aug 5, 2026
- Valid until
- Nov 3, 2026 (51 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 0676CDD22B5D61F44ADFE2B6CBA55729DA0C
- SHA-256 fingerprint
- D6:FA:DD:BE:4A:39:87:67:8F:60:BD:94:92:95:0B:1A:C8:B5:17:8A:35:E8:E8:92:6C:45:1A:2F:52:F0:6F:70
- Chain
- YR1 → Root YR → ISRG Root X1
Certificate Authority Authorization (CAA)
The serving CA (Let's Encrypt) is authorized by this domain's CAA records (letsencrypt.org).
Never get surprised by it-c.ch's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch it-c.ch continuously, notifying you the moment anything moves across all three signals:
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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