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 3k-it.si
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- 3k-it.si
- Valid from
- Nov 6, 2026
- Valid until
- Feb 4, 2027 (87 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 0581493ED5173444795F1E1E1AA9B2934DC5
- SHA-256 fingerprint
- F6:DA:C1:C1:5B:4D:7B:F5:9C:09:8A:A3:BC:7E:80:D2:14:D9:6F:05:A1:3B:8C:25:D2:EC:EF:E8:C6:75:FF:01
- Chain
- YR1 → Root YR → 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 3k-it.si's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch 3k-it.si 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, 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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