279 Area Code – Sacramento, California: Location, Time Zone & History

As the capital of California, Sacramento carries state government as a defining part of its economy, yet in 2012 its mayor officially declared the city "America's Farm-to-Fork Capital," a title reflecting the dense farmland and produce industry that surrounds the metro area. That mix of statehouse business and agricultural community runs through the numbering plan area shared by codes 916 and its overlay.

Area code 916 was one of the three original codes assigned to California in 1947, and it shrank repeatedly as the state grew: splits in 1958 created 209, in 1959 created 707, and in 1997 created 530, the last of which left 916 as the only original 1947 California code with no remaining piece of its original territory. To meet continued demand without another split, the California Public Utilities Commission approved area code 279 as an overlay atop the same reduced 916 territory in a decision announced February 9, 2017; ten-digit dialing became mandatory and the new code entered service in 2018, with existing 916 numbers left unchanged.

The 916 numbering plan area now serves about 2.3 million people across Sacramento, Placer, El Dorado, Amador, and Sutter counties in the Pacific time zone, with Elk Grove, Roseville, Folsom, Citrus Heights, and Rocklin served alongside Sacramento. Local business spans state government, higher education and research, healthcare, agriculture and food production, and information technology.