When registering a domain name in the usTLD, registrants must identity the category under which they qualify for the usTLD Nexus Requirement. The Nexus category provided by at the time of registration will be relayed in .US WHOIS Information using the following category codes.
Nexus Category 1
C11: A natural person who is a United States Citizen.
C12: A natural person who is a permanent resident of the United States of America, or any of its possessions or territories.
Nexus Category 2
C21: A U.S.-based organization or company formed within one of the fifty (50) U.S. states, the District of Columbia, or any of the United States possessions or territories, or organized or otherwise constituted under the laws of a state of the United States of America, the District of Columbia or any of its possessions or territories or a U.S. federal, state, or local government entity or a political subdivision thereof.
Nexus Category 3
C31: A foreign entity or organization that has a bona fide presence in the United States of America or any of its possessions or territories who regularly engages in lawful activities, sales of goods or services or other business, commercial or non-commercial, including not-for-profit relations in the United States.
C32: A foreign entity that has an office or other facility in the United States.