Did You Know? San Diego Area Code Boundaries Changing!

Effective November 11, 2017 the boundary between the current San Diego County, California 619 and 858 area codes was eliminated. This change was to ensure a continuing supply of telephone numbers for the locations the two area codes serve. In other words, the 619 area code will serve the 858 geographic region, and conversely, the 858 area code will serve the 619 geographic region.

  • Beginning May 19, 2018, you must use the new dialing procedure. If you do not, your calls will not be completed, and a recording will instruct you to hang up.
  • Beginning June 19, 2018, new telephone lines or services in the 619 and 858 area codes will be assigned either of these area codes, regardless of which geographic location the area codes were once associated with.
  • Be sure the seven-digit procedures (auto-saved and auto-complete numbers stored in phones, fax machines, medical monitoring devices, alarm and security gates, etc) are updated to comply with this change.
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