Area Code Lookup
What Area Code Is La Mesa?
3 area codes serve La Mesa
La Mesa is served by area codes 575, 619, 858. It spans New Mexico and California.
Area Codes Serving La Mesa
Frequently Asked Questions
What area code is La Mesa?
La Mesa is served by area codes 575, 619, 858.
Why does La Mesa have multiple area codes?
As demand for phone numbers increased, NANPA added area codes through splits (dividing the region) or overlays (layering a new code over the same geography). La Mesa now has 3 area codes — 575 and 619 and 858 — covering the same or overlapping areas.
How do I call La Mesa from outside the US?
To call La Mesa from abroad, dial +1 followed by the area code and 7-digit local number (e.g. +1-575-XXX-XXXX). The +1 is the country code for all NANPA countries.