Complete check

Check domain registration and health

One check shows the selected host’s HTTP response and redirects, its SSL certificate, and the correct registration record with IDN, subdomains, and the Public Suffix List taken into account.

This is a one-time check: it does not create a monitor or send notifications.

Need continuous monitoring?

Get notified before the domain expires

A one-time date cannot warn you at the next renewal. Monitoring refreshes the data and creates an event only when the state really changes.

Set up domain monitoring

More than a generic WHOIS page

The right domain for IDNs and subdomains

UpChecker separates the website host from the registrable domain: HTTP and SSL use the specified subdomain, while RDAP/WHOIS follows the Public Suffix List.

IDN and punycode

Cyrillic and other internationalized names are normalized before network and registration checks.

Public Suffix List

For api.example.co.uk, registration is requested for example.co.uk—not co.uk or an arbitrary part of the name.

Transparent source

The result clearly states whether registration data came from RDAP or fallback WHOIS.