Area code 909

Area code 909 is a California telephone area code that covers far eastern Los Angeles County and southwestern San Bernardino County. The 909 area code was split from area code 714 on November 14, 1992. Western Riverside County was split off from 909 into area code 951 on July 17, 2004. Originally on that same date, the area retaining the 909 area code was to be overlaid by a new area code 752. However, this overlay plan was shelved prior to the 909/951 split, and area code 752 was returned to the NANPA numbering pool to be assigned at a later date. 909 still covers small portions of Corona, Riverside, and Moreno Valley, which are in Riverside County.

Under the traditional NANPA plan, 909 was the "worst" area code for pulse dialers (due to the relatively long time required to send the pulses), in contrast to area codes such as 212 and 213. Area code 909 also has the distinction of being the second to last new area code with a 0 as the middle digit to go online. (The rest of the original style area codes afterwards were 905 [which was previously a "dialaround" code for Mexico] and the last of the N10 area codes that were allowed before the format changed in 1995.)

In 2003, the character Summer from The O.C. demeaningly refers to Pittsburgh as "the 909 of the east".

The 909 () by Jim Stewart is a 2003 novel that chronicles the trials and tribulations of a group of young adults living in Inland Southern California.

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