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North American Area code 435 is a telephone area code which covers all of the U.S. state of Utah outside the Wasatch Front (which includes the Salt Lake City, Ogden, and Provo metropolitan areas in northern Utah). It split from the 801 area code on September 21, 1997, and includes Beaver, Brigham City, Castle Dale, Cedar City, Coalville, Duchesne, Fillmore, Heber City, Hurricane, Junction, Kanab, Loa, Logan, Manila, Manti, Moab, Monticello, Nephi, Park City, Panguitch, Parowan, Price, Randolph, Richfield, St. George, Tooele, Washington, and Vernal. Before area code 435 entered service, 801 had been Utah's sole area code for half a century. It is one of the six pairs of "doughnut area codes" in the numbering plan.
435 is one of the most thinly populated area codes in the nation; the great majority of Utah's population–and with it, most of its landlines and cell phones–is located along the Wasatch Front. As a result, 435 is nowhere near exhaustion. The projected exhaust date for 435 is 2041.
|North: 208/986, 307|
|West: 775||Area Code 435 (totally surrounds 385/801)||East: 307, 970|
|Arizona area codes: 480, 520, 602, 623, 928|
|Colorado area codes: 303/720, 719, 970|
|Idaho area codes: 208/986|
|Nevada area codes: 702/725, 775|
|Wyoming area codes: 307|
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