.us

.us

.us -- America's Internet Address
Introduced	1985
TLD type	Country code top-level domain
Status	Active
Registry	Neustar
Sponsor	United States Department of Commerce
Intended use	Entities connected with United States of America
Actual use	Not much used, as Americans prefer gTLDs
Registration restrictions	U.S. nexus requirement can be enforced by challenge, but seldom is
Structure	Originally registrations were within complex hierarchy, but currently direct second-level registrations are allowed; kids.us permits 3rd-level registrations for child-friendly sites
Documents	RFC 1480; USDoC agreements with Neustar
Dispute policies	usTLD Dispute Resolution Policy (usDRP)
Registry website	nic.us

.us is the Internet country code top-level domain (ccTLD) for the United States of America, established in 1985. Registrants of .us domains must be United States citizens, residents, or organizations, or a foreign entity with a presence in the United States. Most registrants in the country have registered for .com, .net, .org and other gTLDs, rather than .us, which has traditionally only been used by some state governments. In particular, the domains .gov and .mil have been reserved for US usage.

However, from April 2002, second-level domains became available for commercial use. Previously, registrants could only register third-level domains or higher. The .us domain is administered by NeuStar Inc..

Second-level domains

• .ak.us: Alaska
• .al.us: Alabama
• .ar.us: Arkansas
• .az.us: Arizona
• .ca.us: California
• .co.us: Colorado
• .ct.us: Connecticut
• .dc.us: District of Columbia
• .de.us: Delaware
• .dni.us: distributed national institutes
• .fed.us: federal government agencies
• .fl.us: Florida
• .ga.us: Georgia
• .hi.us: Hawaii
• .ia.us: Iowa
• .id.us: Idaho
• .il.us: Illinois
• .in.us: Indiana
• .isa.us: interstate agencies
• .kids.us: content suitable for children under 13
• .ks.us: Kansas
• .ky.us: Kentucky
• .la.us: Louisiana
• .ma.us: Massachusetts
• .md.us: Maryland
• .me.us: Maine
• .mi.us: Michigan
• .mn.us: Minnesota
• .mo.us: Missouri
• .ms.us: Mississippi
• .mt.us: Montana
• .nc.us: North Carolina
• .nd.us: North Dakota
• .ne.us: Nebraska
• .nh.us: New Hampshire
• .nj.us: New Jersey
• .nm.us: New Mexico
• .nsn.us: native sovereign nations (federally recognized Native American tribes)
• .nv.us: Nevada
• .ny.us: New York
• .oh.us: Ohio
• .ok.us: Oklahoma
• .or.us: Oregon
• .pa.us: Pennsylvania
• .ri.us: Rhode Island
• .sc.us: South Carolina
• .sd.us: South Dakota
• .tn.us: Tennessee
• .tx.us: Texas
• .ut.us: Utah
• .vt.us: Vermont
• .va.us: Virginia
• .wa.us: Washington
• .wi.us: Wisconsin
• .wv.us: West Virginia
• .wy.us: Wyoming

Namespace within states (largely deprecated)

• <locality>.<state>.us: cities, counties, parishes, and townships
• ci.<locality>.<state>.us: city government agencies (subdomain under locality)
• town.<locality>.<state>.us: town government agencies (subdomain under locality)
• co.<locality>.<state>.us: county government agencies (subdomain under locality)
• <school-name>.k12.<state>.us: public school districts
• <school-name>.pvt.k12.<state>.us: private schools
• <school-name>.cc.<state>.us: community colleges
• <school-name>.tec.<state>.us: technical and vocational schools
• <library-name>.lib.<state>.us: state, regional, city, and county libraries
• <organization-name>.state.<state>.us: state government agencies
• <organization-name>.gen.<state>.us: general independent entities (groups not fitting into the above categories)

External links

• .us Domain Registry
• .us Domain Registrar
• IANA .us whois information
• usTLD Nexus Requirements - Requirements for registrants of .us domains, Portable Document Format
• Kids.us Content Policies
• RFC 1480: The US Domain (June 1993)