SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
elektros-sro.cz
SSL/TLS Certificate
SSL/TLS Certificate for elektros-sro.cz
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- www.elektros-sro.cz
- Valid from
- Jun 22, 2026
- Valid until
- Sep 20, 2026 (35 days remaining)
- Public key
- RSA 4096-bit
- Serial
- 05E00BBCF38B8C308E87FCED506541D8CF21
- SHA-256 fingerprint
- 39:AA:02:DB:D2:8A:CE:65:67:D4:25:21:4D:ED:DD:6F:3B:75:BA:3C:83:1B:09:20:F5:49:30:23:97:91:AA:8A
- Chain
- YR2 → 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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