.us is the Internet country code top-level domain (ccTLD) for the United States, 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 primarily been used by many state and local governments (although any entity had the option of registering a .us domain). In particular, the domains .gov and .mil have been reserved for U.S. usage.
Since the official release of .us as a second-level domain, it has been adopted and developed by a number of private corporations and local citizenry. The .us country code is no longer in the exclusive realm of only governmental agencies.
Since .US enables you to protect your business online, a domain with .US makes your web address unique and easy to memorize. A .US extension is doing much more, helping you reach and communicate with the audience in United States.
To be eligible to the registration of a .US domain name, registrant must meet one of the following criteria:
Be a citizen or permanent resident of the United States of America or any of its possessions or territories , or
Be an entity or organization that is incorporated 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
Be an entity or organization that has a bona fide presence in the United States.
And at any rate delegate the .US domain name to be registered on DNS servers located in the US territory. (Please be informed that EuroDNS may provide you with such DNS service: https://www.eurodns.com/n/product/choose/prodns)