Area Code 319-240 located in HAMPTON, FRANKLIN, IA, more detail is as below. Place NPA (Numbering Plan Area) : 319 NXX (Local Number Prefix) : 240 City : HAMPTON County : FRANKLIN State : IA (Iowa) NXX Use Type : Wireless NXX Intro Version : 1994-02-04 FIPS (Federal Information Processing Standards) : 19069 LATA (Local Access Transport Area) : 635 Rate Center : WATERLOO ZIP Code Count : 1 ZIP Code Frequency : 20 ZIP Code : 50441 Other Information NPANXX : 319240 County Population : 0 Switch CLLI (Common Language Location Identifier) : CDRRIATSCM0 Time Zone : Central (GMT -06:00) Observes Daylight Saving Time : Yes Company : UNITED STATES CELLULAR CORP. - IOWA OCN (Operating Company Number) : 6266 Coverage Area Name : WATERLOO Latitude : 42.4900 Longitude : -92.3439 ‹ previous : 319-239 next › : 319-240 Telephone Number List 319-240-0000 ~ 319-240-9999