310 Area Code Overlay Information [en Español]The PUC has approved an area code overlay for the 310 region to accommodate the growing need for telephone numbers. This will be the first area code overlay for California. The new 424 area code will serve customers in the same geographic region as the current 310 area code, which includes the Westside and South Bay area of Los Angeles County and a small portion of Ventura County (see our map). With the area code overlay, people with a 310 or 424 area code must dial 1 + area code + seven-digit number when making calls.
Effective December 31, 2005, you should begin dialing 1 + area code + seven-digit number whenever you place a call from the 310 area code. Beginning July 26, 2006, you must use the new dialing procedure for all calls.
New telephone lines or services may be assigned numbers with the 424 area code starting August 26, 2006.
Your local calling area or the cost of long distance calls will not change. Also, you can still dial just three digits to reach 911, as well as 211, 311, 411, 511, 611, and 711. For the associated documents related to the 310 area code overlay, check out the links below:
- Learn more about the overlay plan in our consumer education materials!
- 310 Area Code Overlay Notice [en Español]
- Press Release – from July 24, 2006 on area code overlay beginning
- Decision 05-08-040 – actual Commission decision implementing the area code overlay
- Common Questions and Answers – list of answers to some common questions consumers may have regarding the area code overlay.
- Information Packet – materials and presentations during the public meetings held in April 2005 to address consumers' questions, comments, and concerns
- Petition for Modification – petition by some service providers to alter the previous Commission decision that adopted an area code split as the area code change for the 310 area code
- Decision 00-09-073 – actual Commission decision adopting an area code split as a form of area code change when the 310 area code is near exhaust
- For supplemental information regarding Decision 00-09-073, see the Back-up Contingency Plan.
- To compare an area code overlay versus an area code split, see the Comparison Grid.
To provide written comments regarding this area code overlay, please e-mail them to PublicAdvisor-LA@cpuc.ca.gov. For questions unanswered by your service provider and by the Common Questions and Answers document, please call (866) 340-6147.
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