Area code 909 covers parts of the Inland Empire region in Southern California, including cities such as San Bernardino, Ontario, Chino, Pomona, and Rancho Cucamonga. It was established in 1992 as a split from area code 714 to accommodate rapid suburban expansion east of Los Angeles. The 909 area is known for its diverse communities, affordable housing, and growing industrial and logistics sectors. In 2004, part of 909 was split off to create area code 951. The remaining 909 region has retained its identity, especially in the San Bernardino Valley, and the code is frequently used in regional branding and local pride. From mountain resorts to urban centers, 909 reflects the evolving character of inland Southern California.