Area Code 406-581 located in MILES CITY, CUSTER, MT, more detail is as below. Place NPA (Numbering Plan Area) : 406 NXX (Local Number Prefix) : 581 City : MILES CITY County : CUSTER State : MT (Montana) NXX Use Type : Wireless NXX Intro Version : 1994-02-04 FIPS (Federal Information Processing Standards) : 30017 LATA (Local Access Transport Area) : 650 Rate Center : BOZEMAN ZIP Code Count : 1 ZIP Code Frequency : 6 ZIP Code : 59301 Other Information NPANXX : 406581 Switch CLLI (Common Language Location Identifier) : BLNGMT233MD Time Zone : Mountain (GMT -07:00) Observes Daylight Saving Time : Yes Company : CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT OCN (Operating Company Number) : 6564 Coverage Area Name : BOZEMAN Latitude : 45.6745 Longitude : -111.0383 ‹ previous : 406-581 next › : 406-581 Telephone Number List 406-581-0000 ~ 406-581-9999