909 area code5/6/2023 ![]() Those receiving 840 numbers must follow the same dialing procedure in place for 909 numbers.įor more information: cpuc.ca. 23 for all customers with a telephone number in the 909 area code, which includes the eastern portion of Los Angeles County, small. It originally covered far eastern Los Angeles County and southwestern San Bernardino County. The 11-digit dialing process will be mandatory starting Jan. 23 may be assigned numbers with either the new 840 or original 909 area code. 909 Area Code San Bernardino 909 Location, History, Details, and Phone Numbers Created from area code 714, the California area code 909 was first introduced in 1992 and became mandatory in 1993. The 909 area code serves the southwestern portion of San Bernardino County, the eastern portion of Los Angeles County and small portions of Orange and Riverside Counties. ![]() The 909 area code itself was split to form the 951 area code in 2004. Unincorporated areas within those counties also are included in the overlay.ĥ: Depending on inventory, people requesting new or additional telephone numbers starting Feb. The 909 area code was created from the split of the 714 area code in November 1992. Presently, the southwestern San Bernardino County cities of Big Bear Lake, Colton, Chino, Chino Hills, Fontana, Grand Terrace, Highland, Loma Linda, Montclair, Ontario, Rancho Cucamonga, Redlands, Rialto, San Bernardino, Upland and Yucaipa are served by the 909.Īdditionally, the eastern Los Angeles County cities of Claremont, Diamond Bar, Industry, La Verne, Pomona, San Dimas and Walnut, and Riverside County cities Calimesa and Eastvale use the area code.
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