California San DiegoGeographic

Area Code 858

San Diego, California

Browse Numbers in This Area Code

CA Registered BusinessUS RegisteredSSL Encrypted Checkout

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56,256

Available Numbers

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Cities Covered

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Los Angeles

Timezone

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10-digit

Dialing Rules

Coverage Area

858 Cities and regions covered

California · CA

Major Cities

San Diego La Jolla Poway Del Mar Rancho Bernardo Mira Mesa Solana Beach Encinitas Rancho Peñasquitos Scripps Ranch

In Service 1999-01-01

Status Active

Area Code History

858

858区号于1999年从619区号拆分而来，覆盖加利福尼亚州圣迭戈市北部地区。

Dialing Rules

858

10-digit

When dialing 858 area code numbers, follow these rules:

Local calls require full 10-digit dialing (area code + 7-digit number)
Long-distance calls require 1 + area code + 7-digit number

Why 858 is Valuable for Business

858 · San Diego

The 858 area code covers San Diego and surrounding areas, making it one of the most commercially valuable area codes in California. Owning a premium 858 number enhances your business image and customer trust.

Premium Numbers

858 Premium numbers in this area code

FAQ

858 FAQ

What state is the 858 area code in?

The 858 area code is in California (CA), primarily covering San Diego and surrounding areas.

How do I get a premium 858 area code number?

You can search and buy premium 858 numbers on GreatNumber. We offer one-time payment with lifetime ownership — no monthly fees or hidden charges. We provide full porting assistance after purchase.

Can I port a 858 number to another carrier?

Yes, all numbers purchased on GreatNumber can be ported to any carrier of your choice (T-Mobile, AT&T, Verizon, etc.). Porting typically takes 3-14 business days, and we provide full bilingual support.

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Area Code 858

858 Cities and regions covered

Major Cities

858

858

858 · San Diego

858 Premium numbers in this area code

858 FAQ

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