On May 28, 2017, the CPUC acted to ensure that phone numbers continue to be available to meet demand in the geographic region served by the 805 area code by approving an area code overlay. The overlay will provide additional numbering resources while minimizing customer inconvenience. With the 805/820 area code overlay, customers must dial “1” plus the three-digit area code for all calls from telephone numbers with the 805 and 820 area codes. Customers may begin to use this new dialing procedure on December 1, 2017, when residents and businesses with an 805 area code telephone number may begin dialing 1+ area code + seven digit telephone number when making all local calls. The new dialing procedure will become mandatory for all residential and business customers on June 2, 2018. The new area code that will be added to the 805 region, which serves small portions of Monterey and Kern Counties and most of San Luis Obispo, Santa Barbara, and Ventura Counties, is 820. For more information, please visit the link below: