Main city: Ontario
Timezone: Pacific
Phone type: Cell Number
Operator: Sprint Spectrum L.p.

Ontario, a city located in south west San Bernardino County, California, United States, 35 miles (56 km) east of downtown Los Angeles. Located in the western part of the Inland Empire region, it lies just east of the Los Angeles county line and is part of the Greater Los Angeles Area. As of the 2010 Census, the city had a population of 163,924, up from 158,007 at the 2000 census, making it the county's fourth most populous city after San Bernardino, Fontana, and Rancho Cucamonga. ^source

Area code 951 is a California telephone area code that was split from area code 909 on July 17, 2004. It covers western North and South Riverside County, including, Beaumont, Corona, Canyon Lake, Riverside, Temescal Canyon, Woodcrest, Arlington, Mira Loma, Moreno Valley, Perris, Sun City, Lake Elsinore, Wildomar, Murrieta, Temecula, San Jacinto, Hemet, Lakeview, Nuevo, Norco, Banning, Eastvale, Quail Valley and Idyllwild. ^source