Hagatna, Guam

Where Is Area Code 671?

Area code 671 serves all of Guam, a United States territory in the western Pacific Ocean. Guam is the largest and southernmost island in the Mariana Islands. Hagatna, the territorial capital, is one of the communities within area code 671.

Area code 671 covers the entire island, not just one city. Major communities on Guam include Dededo, Yigo, Tamuning, Mangilao, Barrigada, and Hagatna. Guam does not have counties, so the area code applies island-wide across its villages.

Area code 671 also covers well-known places on Guam. These include Andersen Air Force Base in the north, Naval Base Guam in Santa Rita-Sumai, and Antonio B. Won Pat International Airport in Tamuning. The island is surrounded by the Philippine Sea and sits east of the Philippines and south of Japan.

History of Area Code 671

Area code 671 was created in 1997 when Guam and the Northern Mariana Islands were split away from area code 670. The North American Numbering Plan assigned 671 to Guam and kept 670 for the Northern Mariana Islands. This change took effect on July 1, 1997.

Area code 671 has remained a single area code for Guam since it was established. Public records from the North American Numbering Plan list 671 as a geographic area code for Guam. No overlay area code currently serves Guam.

Key Facts About Area Code 671

• Area code 671 serves Guam, a U.S. territory in the western Pacific Ocean.
• Hagatna is the capital of Guam, and Dededo is Guam's most populous village.
• Area code 671 uses Chamorro Standard Time, which is UTC+10, and Guam does not observe daylight saving time.
• The 2020 United States Census reported that Guam had a population of 153,836.
• Area code 671 was established on July 1, 1997, in a split from area code 670.
• Area code 671 is a geographic area code, not a toll-free code.
• The University of Guam in Mangilao is Guam's main public university and lies within area code 671.
• Notable Guam sites within area code 671 include Two Lovers Point in Tamuning and Andersen Air Force Base in Yigo.

Frequently Asked Questions

What state is area code 671 in?

Area code 671 is in Guam, which is a U.S. territory, not a state.

What major cities use area code 671?

Area code 671 serves Hagatna, Dededo, Yigo, Tamuning, Mangilao, Barrigada, and all other villages on Guam.

Is area code 671 a toll-free number?

No, 671 is a geographic area code for Guam.