Area Code 671-685 located in AGANA HEIGHTS, GUAM, GU, more detail is as below. Place NPA (Numbering Plan Area) : 671 NXX (Local Number Prefix) : 685 City : AGANA HEIGHTS County : GUAM State : GU (None) NXX Use Type : Wireless NXX Intro Version : 11/5/2009 FIPS (Federal Information Processing Standards) : 66010 LATA (Local Access Transport Area) : 871 Rate Center : AGANA ZIP Code Count : 0 ZIP Code Frequency : 0 ZIP Code : 96919 Other Information NPANXX : 671685 Time Zone : Guam (GMT +10:00) Observes Daylight Saving Time : No Company : GUAM WIRELESS TELEPHONE COMPANY, LLC OCN (Operating Company Number) : 3945 Coverage Area Name : AGANA HEIGHTS Latitude : 13.4630 Longitude : -144.7435 ‹ previous : 671-678 next › : 671-686 Telephone Number List 671-685-0000 ~ 671-685-9999