SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
kamna-heater.cz
SSL/TLS Certificate
SSL/TLS Certificate for kamna-heater.cz
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- kamna-heater.cz
- Valid from
- May 28, 2026
- Valid until
- Aug 26, 2026 (35 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 05A4C5165307E9600C5645A548C36AC074E0
- SHA-256 fingerprint
- 8F:D8:EA:84:39:DC:B7:9A:7C:2E:37:BC:A2:DA:B6:0E:03:17:FF:4B:22:99:06:FB:F8:47:88:73:09:6E:96:96
- 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.
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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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