Area Code 319-243 located in WATERLOO, BLACK HAWK, IA, more detail is as below. Place NPA (Numbering Plan Area) : 319 NXX (Local Number Prefix) : 243 City : WATERLOO County : BLACK HAWK State : IA (Iowa) NXX Use Type : Landline NXX Intro Version : 2002-08-04 FIPS (Federal Information Processing Standards) : 19013 LATA (Local Access Transport Area) : 635 Rate Center : CEDARFALLS ZIP Code Count : 0 ZIP Code Frequency : Most frequently occurring ZIP Code, although percentage is unknown. ZIP Code : 50701 Other Information NPANXX : 319243 County Population : 0 Switch CLLI (Common Language Location Identifier) : CDFLIACODS0 MSA CBSA (Core Based Statistical Area) : Waterloo-Cedar Falls, IA MSA CBSA Code (Core Based Statistical Area) : 47940 Time Zone : Central (GMT -06:00) Observes Daylight Saving Time : Yes Company : QWEST CORPORATION OCN (Operating Company Number) : 9631 Coverage Area Name : CEDAR FALLS Latitude : 42.5270 Longitude : -92.4502 ‹ previous : 319-243 next › : 319-244 Telephone Number List 319-243-0000 ~ 319-243-9999