Area Code 435-304 located in RICHFIELD, SEVIER, UT, more detail is as below. Place NPA (Numbering Plan Area) : 435 NXX (Local Number Prefix) : 304 City : RICHFIELD County : SEVIER State : UT (Utah) NXX Use Type : Landline NXX Intro Version : 1999-02-27 FIPS (Federal Information Processing Standards) : 49041 LATA (Local Access Transport Area) : 660 Rate Center : RICHFIELD ZIP Code Count : 0 ZIP Code Frequency : Most frequently occurring ZIP Code, although percentage is unknown. ZIP Code : 84701 Other Information NPANXX : 435304 County Population : 0 Switch CLLI (Common Language Location Identifier) : WVCYUTBXDS0 Time Zone : Mountain (GMT -07:00) Observes Daylight Saving Time : Yes Company : TELEPORT COMMUNICATIONS AMERICA, LLC - UT OCN (Operating Company Number) : 7530 Coverage Area Name : RICHFIELD Latitude : 38.7673 Longitude : -112.0812 ‹ previous : 435-300 next › : 435-310 Telephone Number List 435-304-0000 ~ 435-304-9999