Area Code +1-671-(6780000...6789999) 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 : 6780000 Subscriber Number To : 6789999 National Destination Code Length : 3 Uses National Destination Code : Yes National Significant Number Length : 10 Number Type : M (Mobile, Cellular) Carrier Name : PTI PACIFICA INC. 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-(6540000...6549999) next › : +1-671-(6850000...6859999) Dialling Instructions For trunk calls: 1 671 6780000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 011 1 671 6780000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 6780000 ~ 6789999 (Count: 10,000) Example: +1-671-6780000 / 0111-671-6780000 (1671-6780000 / 1-671-6780000) +1-671-6780001 / 0111-671-6780001 (1671-6780001 / 1-671-6780001) +1-671-6780002 / 0111-671-6780002 (1671-6780002 / 1-671-6780002) +1-671-6780003 / 0111-671-6780003 (1671-6780003 / 1-671-6780003) +1-671-6780004 / 0111-671-6780004 (1671-6780004 / 1-671-6780004) ...+1-671-xxxxxxx / 0111-671-xxxxxxx (1671-xxxxxxx / 1-671-xxxxxxx) ...+1-671-6789995 / 0111-671-6789995 (1671-6789995 / 1-671-6789995) +1-671-6789996 / 0111-671-6789996 (1671-6789996 / 1-671-6789996) +1-671-6789997 / 0111-671-6789997 (1671-6789997 / 1-671-6789997) +1-671-6789998 / 0111-671-6789998 (1671-6789998 / 1-671-6789998) +1-671-6789999 / 0111-671-6789999 (1671-6789999 / 1-671-6789999)