Area Code 406-439 located in REED POINT, STILLWATER, MT, more detail is as below. Place NPA (Numbering Plan Area) : 406 NXX (Local Number Prefix) : 439 City : REED POINT County : STILLWATER State : MT (Montana) NXX Use Type : Wireless NXX Intro Version : 1994-02-04 FIPS (Federal Information Processing Standards) : 30095 LATA (Local Access Transport Area) : 648 Rate Center : HELENA ZIP Code Count : 1 ZIP Code Frequency : 7 ZIP Code : 59069 Other Information NPANXX : 406439 Switch CLLI (Common Language Location Identifier) : HLNAMTIJ0MD Time Zone : Mountain (GMT -07:00) Observes Daylight Saving Time : Yes Company : NEW CINGULAR WIRELESS PCS, LLC OCN (Operating Company Number) : 6010 Coverage Area Name : HELENA Latitude : 46.6012 Longitude : -112.0221 ‹ previous : 406-439 next › : 406-439 Telephone Number List 406-439-0000 ~ 406-439-9999