Guam, the westernmost territory of the United States, is a strategic Pacific island known for its military importance, Chamorro culture, and tropical beaches. As a major hub between Asia and the U.S., Guam plays a key role in regional commerce and defense.

Guam uses area code 671, assigned under the NANP in 1997. This integration allows residents to call mainland U.S. numbers without international charges. Guam’s area code supports growing demand from tourism, military installations, and local communities, linking the island to the broader U.S. telecom network.