Area Code 319-336 located in RIVERSIDE, WASHINGTON, IA, more detail is as below. Place NPA (Numbering Plan Area) : 319 NXX (Local Number Prefix) : 336 City : RIVERSIDE County : WASHINGTON State : IA (Iowa) NXX Use Type : Landline FIPS (Federal Information Processing Standards) : 19183 LATA (Local Access Transport Area) : 635 Rate Center : HILLS ZIP Code Count : 0 ZIP Code Frequency : Most frequently occurring ZIP Code, although percentage is unknown. ZIP Code : 52327 Other Information NPANXX : 319336 County Population : 0 Switch CLLI (Common Language Location Identifier) : CDRRIADTJMD 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 : RIVERSIDE Latitude : 41.5598 Longitude : -91.5356 ‹ previous : 319-335 next › : 319-337 Telephone Number List 319-336-0000 ~ 319-336-9999