Area Code +1-671-(9890000...9899999) located in Agana, Guam (GU), more detail is as below. Place International Dialing Code : 1 International Prefix : 011 National Prefix : 1 National Destination Code : 671 Subscriber Number From : 9890000 Subscriber Number To : 9899999 National Destination Code Length : 3 Uses National Destination Code : Yes National Significant Number Length : 10 Number Type : G (Geographic Land Line, Fixed Line) Carrier Name : GUAM TELECOM - GU Click here to buy Guam Area Code Database Other Information Language Code : en (English) Country Number : 316 (Guam) Country Code : GU (Guam) Region Code : GU Region Name : Guam City : Agana Timezone : Pacific/Guam Coordinated Universal Time : +10:00 Daylight Saving Time : No National Significant Number Minimum Length : 10 Latitude : 13.4700 Longitude : 144.7500 ‹ previous : +1-671-(9880000...9889999) next › : +1-671-(9970000...9979999) Dialling Instructions For trunk calls: 1 671 9890000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 011 1 671 9890000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 9890000 ~ 9899999 (Count: 10,000) Example: +1-671-9890000 / 0111-671-9890000 (1671-9890000 / 1-671-9890000) +1-671-9890001 / 0111-671-9890001 (1671-9890001 / 1-671-9890001) +1-671-9890002 / 0111-671-9890002 (1671-9890002 / 1-671-9890002) +1-671-9890003 / 0111-671-9890003 (1671-9890003 / 1-671-9890003) +1-671-9890004 / 0111-671-9890004 (1671-9890004 / 1-671-9890004) ...+1-671-xxxxxxx / 0111-671-xxxxxxx (1671-xxxxxxx / 1-671-xxxxxxx) ...+1-671-9899995 / 0111-671-9899995 (1671-9899995 / 1-671-9899995) +1-671-9899996 / 0111-671-9899996 (1671-9899996 / 1-671-9899996) +1-671-9899997 / 0111-671-9899997 (1671-9899997 / 1-671-9899997) +1-671-9899998 / 0111-671-9899998 (1671-9899998 / 1-671-9899998) +1-671-9899999 / 0111-671-9899999 (1671-9899999 / 1-671-9899999)