Domain WHOIS Search DomainWatch WHOIS tool can lookup information such as registrant name, address, phone number, email address from WHOIS information of domain name. You can also refer to the change history of WHOIS. You can enter a URL or an email address, a subdomain, an internationalized domain name (IDN). Sanitized domain will be automatically corrected. (日本語.jp → xn--wgv71a119e.jp, example[.