909 Area Code

On June 23, 2017, the North American Numbering Plan Administrator (NANPA) filed Application 17-06-020 with the California Public Utilities Commission (CPUC) to introduce a new area code to the area now served by the 909 area code.

The 909 area code is forecasted to use up all its available prefixes by the 1st quarter of 2020. Adding a new area code to the 909 area code region will provide additional prefixes and new telephone numbers for customers. The telecommunications service providers have proposed to add the new area code using an overlay.

CPUC held public meetings on April 4 and 5, 2017 in Pomona, San Bernardino and Redlands. At the meetings, NANPA presented two options to introduce the new area code.

1.     All services overlay: 

An overlay will introduce a new area code to the geographic area currently served by the 909 area code. All current 909 customers will keep their area code and 7-digit telephone number. New telephone customers or those adding additional lines may be assigned numbers from the new area code. 1+10-digit dialing will be required throughout the overlay area as mandated by the Federal Communications Commission. This means all calls, including local calls, within and between the 909 area code and the new area code will have to be dialed using the 1 + area code + 7-digit telephone number procedure.

2.     Geographic split:

A split would split the 909 region into two areas along the western boundary of the Fontana rate center. One side of the split line keeps the existing 909 area code. The other side or about half of the current 909 customers would receive a new area code. Customers on each side of the split line retain their existing 7-digit telephone numbers and continue to make local calls within the same area code by dialing the 7-digit telephone number. However, customers would need to dial 1 + area code + 7-digit telephone number for calls across the split line between the 909 and the new area code. This disparity in dialing could create widespread customer confusion.

Furthermore, a split for 909 is not feasible. A split would split Fontana and fail to comply with the Public Utilities Code Section requirement of recognizing municipal boundaries during relief plan evaluation. A split would also cause imbalanced area code lifetimes on the two sides of the split line. The area codes on the two sides have lifetimes of 24 and 35 years, respectively. The 11-year difference in lifetimes does not meet the industry criteria of 10 or fewer years in area code lifetime difference and, as a result, NANPA would need to suspend assigning the new area code pending FCC approval of the split option.

Attendees at the three 909 public meetings included the general public, local jurisdiction officials, reporters and telecommunications representatives. Attendees were encouraged to ask questions and express their opinions during the Question-and-Answer period. They were further provided an opportunity to submit written comments to the CPUC.

Public comments were also provided via email and postal mail sent to the Public Advisor’s Office. Concerns and questions expressed in the comments regard issues ranging from the 1 + 10-digit dialing procedure and public education to area code relief network implementation.

909 Public Meeting Materials
909 Public Meeting Staff Report



The majority of the area served by the 909 area code is in 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 serves Big Bear Lake, Colton, Chino, Chino Hills, Fontana, Grand Terrace, Highland, Loma Linda, Montclair, Ontario, Rancho Cucamonga, Redlands, Yucaipa, as well as unincorporated areas in San Bernardino County; Claremont, Diamond Bar, Industry, La Verne, Pomona, San Dimas, Walnut, as well as unincorporated areas in Los Angeles County, and Calimesa and Eastvale, as well as unincorporated areas in Riverside County.

909 Area Code Map
909 Area Code Background  

The CPUC appreciates public feedback concerning area code relief for the 909 area code. You may submit comments by:

• Email to public.advisor@cpuc.ca.gov, or

• Postal mail to CPUC Public Advisor’s Office, 320 W. 4th Street, Suite 500, Los Angeles, CA 90013.


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