Area Code 435-603 located in HYRUM, CACHE, UT, more detail is as below. Place NPA (Numbering Plan Area) : 435 NXX (Local Number Prefix) : 603 City : HYRUM County : CACHE State : UT (Utah) NXX Use Type : Landline NXX Intro Version : 1999-02-27 FIPS (Federal Information Processing Standards) : 49005 LATA (Local Access Transport Area) : 660 Rate Center : HYRUM ZIP Code Count : 0 ZIP Code Frequency : Most frequently occurring ZIP Code, although percentage is unknown. ZIP Code : 84319 Other Information NPANXX : 435603 County Population : 0 Switch CLLI (Common Language Location Identifier) : WVCYUTBXDS0 MSA CBSA (Core Based Statistical Area) : Logan, UT-ID MSA CBSA Code (Core Based Statistical Area) : 30860 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 : HYRUM Latitude : 41.6417 Longitude : -111.8515 ‹ previous : 435-602 next › : 435-604 Telephone Number List 435-603-0000 ~ 435-603-9999