Country Code Lookup: This tool matches countries and related top domains. Select a domain (ex. us) or a country (ex. United States) in the first box and see its corresponding value in the second drop-down box. After selecting the relevant domain in one of the two drop-down boxes, you can click the button to view the homepage of the domain administrator, either to read in depth about the domain or simply to register your own subdomain. Note: We would like to thank www.EchoEcho.com for creating this lookup tool.