619
Covers San Diego County, California
In service since 1982
Split from area code 714
Overlay with 858
City facts
La Mesa area code
Area code for San Diego County, California: history, overlays and how to dial.
619
La Mesa uses area code 619. Because more than one area code serves the same area, local calls need all ten digits.
About area code 619
How to call a number in La Mesa
Inside the US
1 (619) 555-0123Dial 1, the area code, then the seven-digit number.Local call
(619) 555-0123Overlay area: always include the area code.From outside the US
+1 619 555 0123Use your country's exit code or +, then 1 for the US.La Mesa is on Pacific Time (PT); check the time before calling from another zone.
Other cities that share 619
Nearby area codes
| Area code | Used in | Distance |
|---|---|---|
| 858 | San Diego | 7 mi |
| 442 | Carlsbad | 29 mi |
| 760 | Carlsbad | 29 mi |
| 951 | Temecula | 51 mi |
La Mesa quick facts
La Mesa was incorporated on February 16, 1912.
Incorporated1912February 16, 1912
CountySan Diego CountyCalifornia
Area code619Population60,835Census ACS estimateZIP codes291941, 91942Elevation528 ft161 m
Time zonePacific TimePT
Dates, namesake and elevation from Wikipedia: La Mesa, California and Wikidata (checked 2026-11-08); population and ZIP codes from the U.S. Census Bureau.
Questions
What area code is La Mesa?
La Mesa uses area code 619. Because more than one area code serves the same area, local calls need all ten digits.
When did area code 619 start?
Area code 619 dates from 1982, when it was split from area code 714.
Do I need to dial the area code for local calls in La Mesa?
Yes. 619 share the same area as an overlay, so every local call needs the area code plus the seven-digit number (ten digits).
What time zone is area code 619 in?
La Mesa is on Pacific Time (PT).
What other cities use area code 619?
Other cities in this network that share 619 include Lemon Grove, El Cajon, San Diego, Coronado, Imperial Beach.
Sources: Area codes 619 and 858 (Wikipedia) and Wikidata, checked 2026-11-08. Numbering plans change; the North American Numbering Plan Administrator is the official record.