Serving California’s Inland Empire, area code 909 includes cities such as San Bernardino, Ontario, and Rancho Cucamonga. Created in 1992 from a split with 714, it covers a fast-growing region marked by logistics, suburban sprawl, and desert borders. Known for its diversity and dramatic mountain backdrops, the area blends grit and growth. 909 is the Inland Empire’s digital stamp of identity.