Area Code 435-454 located in ALTAMONT, DUCHESNE, UT, more detail is as below. Place NPA (Numbering Plan Area) : 435 NXX (Local Number Prefix) : 454 City : ALTAMONT County : DUCHESNE State : UT (Utah) NXX Use Type : Landline NXX Intro Version : 1997-10-11 FIPS (Federal Information Processing Standards) : 49013 LATA (Local Access Transport Area) : 660 Rate Center : ALTAMONT ZIP Code Count : 321 ZIP Code Frequency : 44 ZIP Code : 84001 Other Information NPANXX : 435454 County Population : 0 Switch CLLI (Common Language Location Identifier) : ALMTUTXCRS1 Time Zone : Mountain (GMT -07:00) Observes Daylight Saving Time : Yes Company : UBTA-UBET COMMUNICATIONS, INC. DBA STRATA NETWORKS OCN (Operating Company Number) : 2287 Coverage Area Name : ALTAMONT Latitude : 40.3595 Longitude : -110.2944 ‹ previous : 435-454 next › : 435-456 Telephone Number List 435-454-0000 ~ 435-454-9999