SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
dplast.cz
SSL/TLS Certificate
SSL/TLS Certificate for dplast.cz
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- dplast.cz
- Valid from
- Sep 3, 2026
- Valid until
- Dec 2, 2026 (58 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 05808AE32F0E77DB6478C6FF51D772DCFE7C
- SHA-256 fingerprint
- D7:5D:10:FE:62:4A:0C:92:7E:0C:2E:23:D7:4C:05:74:CE:53:84:14:EB:38:3E:C4:C9:10:FC:E2:3D:67:AA:73
- 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.
This certificate has been served since Sep 29, 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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