671 Area Code
Guam (statewide), Guam
Area code 671 is located in Guam (statewide), Guam. It covers Hagåtña, Dededo, and surrounding areas in the Chamorro time zone (UTC+10). Administered by NANPA.
Where is area code 671?
Area code 671 is located in Guam (statewide), Guam. It covers Hagåtña, Dededo, and surrounding areas in the Chamorro time zone (UTC+10).
Cities Covered by Area Code 671
Area code 671 primarily serves the Guam (statewide) area of Guam. The exact coverage includes Hagåtña, Dededo, and Yigo, along with surrounding communities and suburbs.
Time Zone
Chamorro Time — UTC+10
Area code 671 operates in the Chamorro Time Zone. When calling 671 numbers from a different time zone, be sure to account for the time difference to reach people during business hours.
About Area Code 671
Area code 671 was introduced in 1997 as a geographic area code serving Guam (statewide), Guam. It remains the primary area code for this region. Area codes are administered by NANPA (North American Numbering Plan Administration), the organization responsible for managing phone number resources in the US and Canada.