Area Code 406-427 located in HAMMOND, CARTER, MT, more detail is as below. Place NPA (Numbering Plan Area) : 406 NXX (Local Number Prefix) : 427 City : HAMMOND County : CARTER State : MT (Montana) NXX Use Type : Landline NXX Intro Version : 1994-02-04 FIPS (Federal Information Processing Standards) : 30011 LATA (Local Access Transport Area) : 650 Rate Center : SO BROADUS ZIP Code Count : 15 ZIP Code Frequency : 6 ZIP Code : 59332 Other Information NPANXX : 406427 Switch CLLI (Common Language Location Identifier) : BRDSMTXBDS0 Time Zone : Mountain (GMT -07:00) Observes Daylight Saving Time : Yes Company : RANGE TELEPHONE COOPERATIVE, INC. OCN (Operating Company Number) : 2251 Coverage Area Name : BROADUS Latitude : 45.4424 Longitude : -105.4043 ‹ previous : 406-427 next › : 406-427 Telephone Number List 406-427-0000 ~ 406-427-9999