Published: August 19, 2016
California area codes 213 and 323 currently serve the downtown Los Angeles area and a number of surrounding cities (Bell Gardens, Cudahy, Huntington Park, Montebello, South Gate, West Hollywwod and more) respectively. On July 14, 2016 the California Public Utilities Commission approved a boundary elimination overlay as the relief method for NPA 323. This means that, when the new overlay complex enters service both area codes 323 and 213 will basically cover the same area. The bad news is that local calls will be dialed using 1+10 digits.
See official NANPA announcement plus area code map (PDF document).
Visit area code 213 page for a list of cities served, map and other info.