Area Code +1-406-(4399000...4399999) located in Helena, 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 : 4399000 Subscriber Number To : 4399999 National Destination Code Length : 3 Uses National Destination Code : Yes National Significant Number Length : 10 Number Type : M (Mobile, Cellular) Carrier Name : NEW CINGULAR WIRLESS 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 : Helena Timezone : America/Denver Coordinated Universal Time : -07:00 Daylight Saving Time : Yes National Significant Number Minimum Length : 10 Latitude : 46.6000 Longitude : -112.0200 ‹ previous : +1-406-(4398000...4398999) next › : +1-406-(4400000...4409999) Dialling Instructions For trunk calls: 0 406 4399000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 011 1 406 4399000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 4399000 ~ 4399999 (Count: 1,000) Example: +1-406-4399000 / 0111-406-4399000 (1406-4399000 / 1-406-4399000) +1-406-4399001 / 0111-406-4399001 (1406-4399001 / 1-406-4399001) +1-406-4399002 / 0111-406-4399002 (1406-4399002 / 1-406-4399002) +1-406-4399003 / 0111-406-4399003 (1406-4399003 / 1-406-4399003) +1-406-4399004 / 0111-406-4399004 (1406-4399004 / 1-406-4399004) ...+1-406-xxxxxxx / 0111-406-xxxxxxx (1406-xxxxxxx / 1-406-xxxxxxx) ...+1-406-4399995 / 0111-406-4399995 (1406-4399995 / 1-406-4399995) +1-406-4399996 / 0111-406-4399996 (1406-4399996 / 1-406-4399996) +1-406-4399997 / 0111-406-4399997 (1406-4399997 / 1-406-4399997) +1-406-4399998 / 0111-406-4399998 (1406-4399998 / 1-406-4399998) +1-406-4399999 / 0111-406-4399999 (1406-4399999 / 1-406-4399999)
