Area code 909

909 area code is running out of numbers, what happens next ...

src: pbs.twimg.com

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. By August 1993 use of the new area code became mandatory. 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.)

Video Area code 909

Cities in the 909 area code

Los Angeles County

Claremont
Diamond Bar
Glendora (mostly in the 626 area code)
City of Industry (mostly in the 626 area code and small portion in the 562 area code)
La Verne
Pomona
Rowland Heights (also in the 626 area code and small portion in the 562 area code)
San Dimas
Walnut (small portion in the 626 area code)
West Covina (mostly in the 626 area code)