SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
kat-ka.si
SSL/TLS Certificate
SSL/TLS Certificate for kat-ka.si
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- *.zmagovalka.si
- Valid from
- Sep 4, 2026
- Valid until
- Dec 3, 2026 (33 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 05B60F3A88CCBFCB0C3C1BDAFBC66AF210D6
- SHA-256 fingerprint
- 56:64:40:F5:49:42:0E:2B:39:F8:B4:21:AB:E5:7C:C4:E7:FA:43:FA:51:59:1A:1B:2C:4A:8F:2D:23:C1:B0:BB
- 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 kat-ka.si's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch kat-ka.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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