SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
tecon-ul.cz
SSL/TLS Certificate
SSL/TLS Certificate for tecon-ul.cz
Valid- Issued by (CA)
- Google Trust Services
- Subject
- tecon-ul.cz
- Valid from
- Sep 14, 2026
- Valid until
- Dec 13, 2026 (71 days remaining)
- Public key
- EC 256-bit
- Serial
- 17D39FCB38AA10A4132C4D2A57EA93B6
- SHA-256 fingerprint
- CB:D4:BD:06:70:12:AE:E1:73:8C:58:35:0E:12:EB:78:04:18:BE:8D:06:D6:1F:C7:F5:38:36:9D:69:B3:3D:88
- Chain
- WE1 → GTS Root R4
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
This certificate has been served since Sep 25, 2026.
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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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