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-co.ch
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- it-co.ch
- Valid from
- Oct 5, 2026
- Valid until
- Jan 3, 2027 (89 days remaining)
- Public key
- EC 256-bit
- Serial
- 05143A9F1B85618E027E210860C36F5E4BA6
- SHA-256 fingerprint
- 74:55:1D:56:94:F6:59:D2:66:FD:EE:33:EC:00:7D:A7:90:B9:EC:B7:68:C8:45:89:86:4A:EA:A1:2D:70:37:58
- 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 it-co.ch's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch it-co.ch 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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