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 please-do-not.click

Valid
Issued by (CA)
Let's Encrypt
Subject
*.please-do-not.click
Valid from
Sep 18, 2026
Valid until
Dec 17, 2026 (79 days remaining)
Public key
RSA 2048-bit
Serial
05892527F15C8E5CBE77EE675819DAED4CF7
SHA-256 fingerprint
D6:11:E8:F5:CA:A3:C1:0C:B8:BB:AC:3E:93:40:A5:33:EA:4E:33:54:78:F8:44:A7:C7:95:B5:2A:FE:A2:62:BB
Chain
YR1 → Root YR → ISRG Root X1
Subject Alternative Names (2)
*.please-do-not.click, please-do-not.click

Certificate Authority Authorization (CAA)

No CAA policy is published for this domain — any certificate authority may issue for it.

Never get surprised by please-do-not.click's certificate expiring

This is today's certificate. Turn on monitoring and we'll watch please-do-not.click 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.