Area Code 858 at a Glance
| Area code | 858 |
| Region | California |
| Country | United States |
| Primary timezone | America/Los_Angeles |
| Dialing format | +1 (858) NXX-XXXX |
Cities and Places Using Area Code 858
Based on prefix-level carrier data, area code 858 covers places including:
- San Diego, CA
- La Jolla, CA
- Poway, CA
- Rancho Santa Fe, CA
Frequently Asked Questions
Where is area code 858?
Area code 858 serves California, United States.
Who is calling me from area code 858?
A call from area code 858 most likely originates from California, but caller ID can be spoofed. If an unknown caller asks for personal or payment information, hang up and call the organization back on its official number.
How do I dial a 858 number?
Within North America: dial 1-858 followed by the 7-digit number. From abroad: your international prefix (like 00 or +), then 1 858 and the number.