Area Code 231-584 located in ALBA, ANTRIM, MI, more detail is as below. Place NPA (Numbering Plan Area) : 231 NXX (Local Number Prefix) : 584 City : ALBA County : ANTRIM State : MI (Michigan) NXX Use Type : Landline NXX Intro Version : 1999-07-22 FIPS (Federal Information Processing Standards) : 26009 LATA (Local Access Transport Area) : 348 Rate Center : ALBA ZIP Code Count : 100 ZIP Code Frequency : 28 ZIP Code : 49611 Other Information NPANXX : 231584 County Population : 0 Switch CLLI (Common Language Location Identifier) : ALBAMIXJRS0 Time Zone : Eastern (GMT -05:00) Observes Daylight Saving Time : Yes Company : PIGEON TELEPHONE CO. OCN (Operating Company Number) : 0721 Coverage Area Name : ELMIRA Latitude : 44.9742 Longitude : -84.9654 ‹ previous : 231-583 next › : 231-584 Telephone Number List 231-584-0000 ~ 231-584-9999