Area Code 319-285 located in RIVERSIDE, WASHINGTON, IA, more detail is as below. Place NPA (Numbering Plan Area) : 319 NXX (Local Number Prefix) : 285 City : RIVERSIDE County : WASHINGTON State : IA (Iowa) NXX Use Type : Landline NXX Intro Version : 3/19/2010 FIPS (Federal Information Processing Standards) : 19183 LATA (Local Access Transport Area) : 635 Rate Center : SHARON CTR ZIP Code Count : 0 ZIP Code Frequency : 0 ZIP Code : 52327 Other Information NPANXX : 319285 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 : MCC TELEPHONY OF IOWA, LLC - IA OCN (Operating Company Number) : 751F Coverage Area Name : KALONA Latitude : 41.5663 Longitude : -91.6534 ‹ previous : 319-284 next › : 319-286 Telephone Number List 319-285-0000 ~ 319-285-9999