There are 3 Nexus Categories under which you can register .us
1. A natural person (i) who is a United States citizen, (ii) who is a permanent resident of the United States of America or any of its possessions or territories, or (iii) whose primary place of domicile is in the United States of America or any of its possessions [Nexus Category 1],
2. A United States entity or organization that is (i) incorporated within one of the fifty (50) U.S. states, the District of Columbia, or any of the United States possessions or territories, or (ii) 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 (including a federal, state, or local government of the United States or a political subdivision thereof, and non-commercial organizations based in the United States) [Nexus Category 2], or
3. A foreign entity or organization that has a bona fide presence in the United States of America or any of its possessions or territories [Nexus Category 3].