SSL/TLS Certificate Lookup

Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted

SSL/TLS Certificate for zone-automation.com

Valid
Issued by (CA)
Let's Encrypt
Subject
www.zone-automation.com
Valid from
Aug 5, 2026
Valid until
Nov 3, 2026 (60 days remaining)
Public key
RSA 2048-bit
Serial
064CA79230DD4CD2CF7ECD0F3D4B60863037
SHA-256 fingerprint
5C:48:3C:B6:05:F2:44:D4:78:25:03:96:2B:2E:0A:BB:1E:7F:2B:8F:7B:C5:69:CB:7E:1A:34:42:ED:52:FF:B7
Chain
YR1 → Root YR → ISRG Root X1
Subject Alternative Names (2)
www.zone-automation.com, zone-automation.com

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 Aug 28, 2026.

Never get surprised by zone-automation.com's certificate expiring

This is today's certificate. Turn on monitoring and we'll watch zone-automation.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.

Monitor this certificate free

Free for your first domain: uptime, DNS, and certificate together. No credit card.