.us is for United States
Registration web site:
Third Level Domains Registered
ICANN records: http://www.iana.org/root-whois/us.htm
Notes: Domains are divided into city.state.us subdomains. These domain may or may nor delegated to an authorizided agent. Delegated city subdomains may or may not have a cost. Whois only covers third level delegation to authorized agents. City subdomains not delegated are free and registered via the .us registery currently operated by Verisign. Dispute policy identified in agreement is a dead link. A request for proposals to operate .us has been issued (http://www.ntia.doc.gov/ntiahome/domainname/usrfp/cbd52501.txt) by the US goverment in May, 2001.
Domain Registration Rules: