Area Code +1-406-(2166000...2166999) 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 : 2166000 Subscriber Number To : 2166999 National Destination Code Length : 3 Uses National Destination Code : Yes National Significant Number Length : 10 Number Type : M (Mobile, Cellular) Carrier Name : VERIZON WIRELESS-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-(2165000...2165999) next › : +1-406-(2167000...2167999) Dialling Instructions For trunk calls: 0 406 2166000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 011 1 406 2166000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 2166000 ~ 2166999 (Count: 1,000) Example: +1-406-2166000 / 0111-406-2166000 (1406-2166000 / 1-406-2166000) +1-406-2166001 / 0111-406-2166001 (1406-2166001 / 1-406-2166001) +1-406-2166002 / 0111-406-2166002 (1406-2166002 / 1-406-2166002) +1-406-2166003 / 0111-406-2166003 (1406-2166003 / 1-406-2166003) +1-406-2166004 / 0111-406-2166004 (1406-2166004 / 1-406-2166004) ...+1-406-xxxxxxx / 0111-406-xxxxxxx (1406-xxxxxxx / 1-406-xxxxxxx) ...+1-406-2166995 / 0111-406-2166995 (1406-2166995 / 1-406-2166995) +1-406-2166996 / 0111-406-2166996 (1406-2166996 / 1-406-2166996) +1-406-2166997 / 0111-406-2166997 (1406-2166997 / 1-406-2166997) +1-406-2166998 / 0111-406-2166998 (1406-2166998 / 1-406-2166998) +1-406-2166999 / 0111-406-2166999 (1406-2166999 / 1-406-2166999)