Cities in area code 858
Which places use area code 858? 19 rate centers in California, the biggest being La Jolla, San Diego:linda Vista Da, San Diego:mira Mesa Da. Data below is NANPA's official prefix-to-rate-center mapping.
La Jolla, San Diego:linda Vista Da, San Diego:mira Mesa Da, Poway, Del Mar, Rancho Bernardo, Rancho Penasquitos and San Diego:san Diego Da hold the largest prefix inventories; and 10 smaller communities down to single-prefix localities. Each locality below links to its rate-center page with the full prefix list.
19 of the localities fall within FCC top-100 metropolitan statistical areas; the rest are smaller communities.
17 of these localities are also reachable through other area codes — overlay territory where the same place answers to several codes.
All of the code's territory keeps Pacific time.
Remember that people keep numbers when they relocate, so a 858 number is a where-it-was-issued fact, not a where-they-are fact.
| Locality (rate center) | Active prefixes | Metro area | All codes serving it |
|---|---|---|---|
| La Jolla | 166 | San Diego-Cula Vista-Carlsbad, CA | 619, 858 |
| San Diego:linda Vista Da | 80 | San Diego-Cula Vista-Carlsbad, CA | 619, 858 |
| San Diego:mira Mesa Da | 68 | San Diego-Cula Vista-Carlsbad, CA | 619, 858 |
| Poway | 45 | San Diego-Cula Vista-Carlsbad, CA | 619, 858 |
| Del Mar | 45 | San Diego-Cula Vista-Carlsbad, CA | 619, 858 |
| Rancho Bernardo | 41 | San Diego-Cula Vista-Carlsbad, CA | 858 |
| Rancho Penasquitos | 21 | San Diego-Cula Vista-Carlsbad, CA | 858 |
| San Diego:san Diego Da | 21 | San Diego-Cula Vista-Carlsbad, CA | 619, 760, 858 |
| Chula Vista | 17 | San Diego-Cula Vista-Carlsbad, CA | 619, 858 |
| Rancho Santa Fe | 14 | San Diego-Cula Vista-Carlsbad, CA | 619, 858 |
| El Cajon | 13 | San Diego-Cula Vista-Carlsbad, CA | 619, 858 |
| La Mesa | 8 | San Diego-Cula Vista-Carlsbad, CA | 619, 858 |
| National City | 5 | San Diego-Cula Vista-Carlsbad, CA | 619, 858 |
| Coronado | 3 | San Diego-Cula Vista-Carlsbad, CA | 619, 858 |
| Harbison-alpine | 2 | San Diego-Cula Vista-Carlsbad, CA | 619, 858 |
| Pine Valley | 2 | San Diego-Cula Vista-Carlsbad, CA | 619, 858 |
| Dulzura | 1 | San Diego-Cula Vista-Carlsbad, CA | 619, 858 |
| Jacumba | 1 | San Diego-Cula Vista-Carlsbad, CA | 619, 858 |
| Campo | 1 | San Diego-Cula Vista-Carlsbad, CA | 619, 858 |
FAQ
What is the biggest city in area code 858?
La Jolla holds the most active prefixes (166), making it the code's largest numbering locality.
How many places does 858 cover?
19 rate centers in California hold active 858 prefixes, from La Jolla down to communities with a single prefix.
Does a 858 number guarantee the caller lives in one of these places?
No — the tables show where number blocks were issued. Porting and VoIP let people keep or acquire numbers anywhere.