Area Code +1-671-(4780000...4789999) 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 : 4780000 Subscriber Number To : 4789999 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 : TELEGUAM HOLDINGS 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-(4770000...4779999) next › : +1-671-(4790000...4799999) Dialling Instructions For trunk calls: 1 671 4780000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 011 1 671 4780000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 4780000 ~ 4789999 (Count: 10,000) Example: +1-671-4780000 / 0111-671-4780000 (1671-4780000 / 1-671-4780000) +1-671-4780001 / 0111-671-4780001 (1671-4780001 / 1-671-4780001) +1-671-4780002 / 0111-671-4780002 (1671-4780002 / 1-671-4780002) +1-671-4780003 / 0111-671-4780003 (1671-4780003 / 1-671-4780003) +1-671-4780004 / 0111-671-4780004 (1671-4780004 / 1-671-4780004) ...+1-671-xxxxxxx / 0111-671-xxxxxxx (1671-xxxxxxx / 1-671-xxxxxxx) ...+1-671-4789995 / 0111-671-4789995 (1671-4789995 / 1-671-4789995) +1-671-4789996 / 0111-671-4789996 (1671-4789996 / 1-671-4789996) +1-671-4789997 / 0111-671-4789997 (1671-4789997 / 1-671-4789997) +1-671-4789998 / 0111-671-4789998 (1671-4789998 / 1-671-4789998) +1-671-4789999 / 0111-671-4789999 (1671-4789999 / 1-671-4789999)