Mistport Workstation static
https://whois.mist
WHOIS domain lookup
Enter a domain, e.g. beatbird.app

The static version can’t take typing; pick one of these searches: beatbird.app · member-care.com · beatbird-help.app · bеatbird.app · kq3fz.idv.tw · maskmail.tw

A full address works too; it looks up the registered domain.