Time Zone: GMT-5; EST +0

Map of Guam Careful!!! This file is really large.
Facts about Guam

This country is part of the North American Numbering Plan (NANP).

1-671 - Guam

Area code (671) + local number (7 digits) = 10 digits

Since July 1st 1997, the area code used to reach Guam is 671, the previously used country code 671 will still be available until July 1st 1998.