Area Code 435-231 located in CENTRAL, WASHINGTON, UT, more detail is as below. Place NPA (Numbering Plan Area) : 435 NXX (Local Number Prefix) : 231 City : CENTRAL County : WASHINGTON State : UT (Utah) NXX Use Type : Wireless NXX Intro Version : 1999-02-27 FIPS (Federal Information Processing Standards) : 49053 LATA (Local Access Transport Area) : 660 Rate Center : ENTERPRISE ZIP Code Count : 0 ZIP Code Frequency : Most frequently occurring ZIP Code, although percentage is unknown. ZIP Code : 84722 Other Information NPANXX : 435231 County Population : 0 Switch CLLI (Common Language Location Identifier) : WJRDUT30CM1 MSA CBSA (Core Based Statistical Area) : St. George, UT MSA CBSA Code (Core Based Statistical Area) : 41100 Time Zone : Mountain (GMT -07:00) Observes Daylight Saving Time : Yes Company : CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT OCN (Operating Company Number) : 6571 Coverage Area Name : CENTRAL Latitude : 37.5664 Longitude : -113.7183 ‹ previous : 435-230 next › : 435-232 Telephone Number List 435-231-0000 ~ 435-231-9999