Published: May 30, 2017
California area codes 619 and 858 currently cover the southern and northern parts of San Diego respectively, including some of its suburbs. On April 17, 2017 the California Public Utilities Commission approved a boundary removal between the two Numbering Plan Areas. The decision will take the pressure off area code 619, which is approaching exhaustion. The resulting overlay complex 619/858 will cover the entire area currently served by the two area codes and will have as a side effect mandatory 1+10 digit dialing for all telephone calls within the area.
See official announcement and other helpful info (PDF document).
Visit area code 858 page for a list of cities served, map and other info.