SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
zone-files.com
SSL/TLS Certificate
SSL/TLS Certificate for zone-files.com
Hostname mismatch- Issued by (CA)
- Let's Encrypt
- Subject
- freesamples.com
- Valid from
- Jun 28, 2026
- Valid until
- Sep 26, 2026 (64 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 05B9E4FEA39534BACAC6E3E9D2D7E388EDE2
- SHA-256 fingerprint
- B6:BD:67:78:DF:CB:61:12:15:D6:10:B1:CB:D0:89:96:76:18:17:FE:25:76:F4:A4:1E:6C:3F:FA:29:EB:3B:32
- Chain
- YR1 → Root YR → ISRG Root X1
Certificate Authority Authorization (CAA)
Never get surprised by zone-files.com's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch zone-files.com 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, 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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