Area Code 319-648 located in AINSWORTH, WASHINGTON, IA, more detail is as below. Place NPA (Numbering Plan Area) : 319 NXX (Local Number Prefix) : 648 City : AINSWORTH County : WASHINGTON State : IA (Iowa) NXX Use Type : Landline NXX Intro Version : 1994-02-04 FIPS (Federal Information Processing Standards) : 19183 LATA (Local Access Transport Area) : 635 Rate Center : RIVERSIDE ZIP Code Count : 30 ZIP Code Frequency : 3 ZIP Code : 52201 Other Information NPANXX : 319648 County Population : 0 MSA CBSA (Core Based Statistical Area) : Iowa City, IA MSA CBSA Code (Core Based Statistical Area) : 26980 Time Zone : Central (GMT -06:00) Observes Daylight Saving Time : Yes Company : WINDSTREAM IOWA COMMUNICATIONS, INC. OCN (Operating Company Number) : 1178 Coverage Area Name : RIVERSIDE Latitude : 41.4805 Longitude : -91.5857 ‹ previous : 319-648 next › : 319-648 Telephone Number List 319-648-0000 ~ 319-648-9999