North American area code 442 is a scheduled telephone area code to be overlaid onto 760. Callers may begin dialing 442 in May 2009; 442 becomes mandatory in November 2009.

The original plan for 442 was a split from 760; the portion of the area code in San Diego County would have become 442, while the rest of the area code would have remained 760. This plan, when announced, was met with protest in the affected areas. Many of the protesters organized through the website Keep760.org, which supported an overlay rather than a split. In a rare move, the California Public Utilities Commission agreed to reconsider their decision, and on October 16, 2008, the original plan was scrapped in favor of an overlay.

According to the schedule announced by the CPUC, permissive dialing begins on May 2, 2009; mandatory dialing begins October 24; and the overlay becomes effective on November 21. All callers in the 760/442 area code will now have to dial the full 10 digit telephone number to make phone calls regardless of the area code they are calling, 1 - area code - number. Cell phone callers may drop the 1 but will still be required to dial the area code.