Area Code +1-406-(2160000...2169999) located in Great Falls, Montana (MT), more detail is as below. Place International Dialing Code : 1 International Prefix : 011 National Prefix : 1 National Destination Code : 406 Subscriber Number From : 2160000 Subscriber Number To : 2169999 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 : 3 RVRS TEL COOP MT Click here to buy United States Area Code Database Other Information Language Code : en (English) Country Number : 840 (United States) Country Code : US (United States) Region Code : MT Region Name : Montana City : Great Falls Timezone : America/Denver Coordinated Universal Time : -07:00 Daylight Saving Time : Yes National Significant Number Minimum Length : 10 Latitude : 47.5100 Longitude : -111.2900 ‹ previous : +1-406-(2154000...2154999) next › : +1-406-(2170000...2170999) Dialling Instructions For trunk calls: 0 406 2160000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 011 1 406 2160000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 2160000 ~ 2169999 (Count: 10,000) Example: +1-406-2160000 / 0111-406-2160000 (1406-2160000 / 1-406-2160000) +1-406-2160001 / 0111-406-2160001 (1406-2160001 / 1-406-2160001) +1-406-2160002 / 0111-406-2160002 (1406-2160002 / 1-406-2160002) +1-406-2160003 / 0111-406-2160003 (1406-2160003 / 1-406-2160003) +1-406-2160004 / 0111-406-2160004 (1406-2160004 / 1-406-2160004) ...+1-406-xxxxxxx / 0111-406-xxxxxxx (1406-xxxxxxx / 1-406-xxxxxxx) ...+1-406-2169995 / 0111-406-2169995 (1406-2169995 / 1-406-2169995) +1-406-2169996 / 0111-406-2169996 (1406-2169996 / 1-406-2169996) +1-406-2169997 / 0111-406-2169997 (1406-2169997 / 1-406-2169997) +1-406-2169998 / 0111-406-2169998 (1406-2169998 / 1-406-2169998) +1-406-2169999 / 0111-406-2169999 (1406-2169999 / 1-406-2169999)