Area Code 671 Location

Area code 671 covers the entire island of Guam, including the capital, Hagåtña (Hagatna), in the western Pacific. As part of the North American Numbering Plan (NANP), Guam’s phone numbers work like U.S. numbers, making 671 a key link between Micronesia and the mainland. Located in Chamorro Standard Time (UTC+10), Hagåtña is the historic center of government and culture, known for its Spanish-era sites and coastal views. Fun fact: Hagåtña was formerly called Agana, reflecting Guam’s layered history.

This single Guam area code serves every village and major landmark on the island. Key places covered by 671 include:

• Hagåtña (Hagatna) – Plaza de España and Dulce Nombre de Maria Cathedral-Basilica
• Dededo – Guam’s most populous village
• Tamuning/Tumon – A.B. Won Pat International Airport and the Tumon Bay resort district
• Yigo – Home to Andersen Air Force Base
• Mangilao – University of Guam
• Santa Rita-Sumai and Piti – Naval Base Guam and Apra Harbor From beaches to bases, one area code reaches it all.

Established: 1997, when Guam joined the NANP. From the U.S. and Canada, dial 1 + 671 + seven-digit number; internationally, use +1 671. The code replaced Guam’s old stand-alone international identity and aligned the island with U.S.-style dialing. Its broad coverage makes 671 the go-to identifier for Guam phone numbers, whether you’re calling government offices in Hagåtña, a hotel in Tumon, or the university in Mangilao.

“Guam’s population was 153,836 in 2020.” — U.S. Census Bureau (2020)