United States domain names use the .us country-code top-level domain (ccTLD), which is the official domain for the U.S. and reserved for entities with a "nexus" or genuine connection to the United States. This includes citizens, permanent residents, U.S. or U.S. territory-incorporated organizations, and entities with a bona fide presence in the U.S. .US domains are valuable for businesses and individuals to establish a distinctly American online presence, target U.S. customers, improve SEO for local searches, and convey trust and credibility.