What is a domain name?

A domain name is a hierarchical DNS identifier read from right to left. In www.example.co.jp, jp is the top-level domain and example.co.jp may be the registrable domain.

Registrable domain

Taking only the last two labels fails for suffixes such as co.jp. NetKarte uses Public Suffix List rules to determine the registration unit.

Internationalized names

For IDNs, NetKarte shows both display Unicode and DNS-compatible Punycode. When a URL is entered, only its validated hostname is used.

One input, different lookup targets

Enter a domain name or HTTP/HTTPS URL in Domain Information Lookup, complete verification, and search. Compare the input hostname, registered domain, and Punycode in basic information to see the registration unit queried.

For the illustrative https://www.example.co.jp/path, domain registration lookup targets example.co.jp, while DNS Lookup targets www.example.co.jp. A path is not part of a DNS name. NetKarte extracts the hostname; it does not open the supplied web page to retrieve its contents.

Check input, registered domain, and Punycode. Visually similar Unicode characters can form different names. A valid name does not establish ownership or safety. Use registration lookup for registration details and DNS Lookup for current destinations or mail settings.