San Diego, CA business phone guide

San Diego, CA at a glance

The San Diego-Chula Vista-Carlsbad, CA metro area covers 1 county in California and had 3.3 million residents in July 2024, up 0.0% since April 2020. The U.S. population grew 2.6% over the same period. By population it ranks 18th of the 925 metro and micropolitan areas and 16th by business establishments.

Establishments and employment in San Diego, CA

County Business Patterns counted 93,407 establishments in the area in 2023, employing 1,391,721 people in mid-March with $106.2 billion in annual payroll. That is an average of 14.9 employees per establishment. 58.8% of establishments with employees had fewer than five people. By establishment count, the largest sectors are professional, scientific, and technical services (16,216), health care and social assistance (11,649), and retail trade (9,207).

How San Diego, CA's businesses compare

San Diego, CA has 28.3 business establishments per 1,000 residents, 15.2% above the U.S. figure of 24.6. Establishments average 14.9 employees against 16.7 nationally, and payroll per employee is $76,323 (11.7% above the U.S. $68,342). 58.8% of establishments with employees have fewer than five people (U.S.: 55.5%), while 5.0% have 50 or more. Most establishments are far smaller than the average suggests, so it pays to price a phone plan at the headcount you actually have rather than the average.

Small-business industries in San Diego, CA

Of the 141 industries these guides cover, 141 have a published Census count in San Diego, CA. The largest are limited-service restaurants (3,086), offices of real estate agents and brokers (2,942), and full-service restaurants (2,650). Relative to population, mortgage and nonmortgage loan brokers are the most over-represented: 9.5 per 100,000 residents against 2.9 nationally.

Area codes in San Diego, CA

The area's named cities and towns have 1,123 NANPA-assigned exchanges across 4 area codes; 619 has the most (66%). A local number in the code your customers know is the simplest signal that you are nearby; Callata's plan includes up to 3.

Local numbers by city

Pages for 12 cities and towns in the area list their area codes, prefixes and carriers.

Phone costs for a typical San Diego, CA business

Per-seat phone plans multiply by headcount. For the rounded average establishment size in San Diego, CA, 15 users on RingCentral RingEX Core come to $450.00 a month and on Ooma Office Pro $374.25, at month-to-month list prices checked September 28, 2026. On Callata the same 15 people cost $299.00 a month, less than either per-seat plan.

Callata in San Diego, CA

Callata Office costs $99 per month for up to 5 people, and each additional user is $20 a month. That covers up to 3 local numbers, calling from a browser or your cell, transcribed voicemail, recorded calls with AI summaries, after-hours routing and E911 on each number.

If you already have a number in San Diego, CA, porting it to Callata is free. Texting from a local number requires a one-time carrier registration (10DLC, $49), and the numbers available in any area code depend on carrier inventory when you choose them.

Optional AI agents (receptionist, sales, support or scheduler) can answer calls after hours or when nobody picks up, take messages, text, email and transfer to your team. They are billed from prepaid AI minutes at $0.25 per minute, identify themselves as AI, and may only place outbound calls to people who consented, between 8am and 9pm.