SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
t-base.cz
SSL/TLS Certificate
SSL/TLS Certificate for t-base.cz
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- www.t-base.cz
- Valid from
- Oct 3, 2026
- Valid until
- Jan 1, 2027 (72 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 06C4298BAC175041BF1FCC02D3BB6C1379AB
- SHA-256 fingerprint
- 97:E7:96:8D:82:F9:31:CC:00:E7:FD:DF:64:8C:8F:55:18:65:17:30:5F:95:BA:0F:5A:9F:33:C2:13:66:D4:7F
- 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 t-base.cz's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch t-base.cz 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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