Get a local business phone number in San Francisco, CA

Area codes in San Francisco

With 827,526 residents in the Census 2024 estimate, San Francisco sits in San Francisco County, California. NANPA lists 559 exchanges for its rate center across 2 area codes; 415 has the most (483, 86%). 415 is part of an overlay with 628, so a new local number in San Francisco may carry any of those codes depending on which have numbers available. San Francisco is in the Pacific time zone.

According to NANPA's dialing-plan data, local calls within 415 are dialed as 1 plus ten digits and toll calls as 1 plus ten digits.

Phone carriers in San Francisco

37 carriers hold the 559 exchanges assigned to San Francisco's rate center. Pacific Bell has the most, with 226. 346 of them are pooled codes, which the holder shares with other carriers in blocks of 1,000 numbers. The table counts codes by the operating company NANPA assigned them to, not by who serves each number today.

Exchanges (NPA-NXX) assigned in San Francisco

These are the central office codes NANPA records for San Francisco. A caller seeing one of them recognizes a local number. The earliest assignment date recorded in the file for these codes is 2001. 31 of the 559 were assigned in 2020 or later.

When San Francisco's exchanges were assigned

Assignment dates show when each block of San Francisco numbers was added to the local supply.

Rate centers and local calling in San Francisco

What a caller sees as "local" is the area code plus prefix. In San Francisco, those come from the SNFC CNTRL rate center, as recorded by NANPA.

Keeping an existing San Francisco number costs nothing on Callata, because porting is free; a new number depends on what carriers have open in 415 when you pick it.

Who does business near San Francisco

San Francisco is part of the San Francisco-Oakland-Fremont, CA metro area, home to 4.6 million people in 2024. County Business Patterns counted 133,246 business establishments in the San Francisco, CA metro area in 2023, employing 2,417,363 people. The largest sectors by establishment count are professional, scientific, and technical services (23,140), health care and social assistance (16,920), and accommodation and food services (13,736).

Setting up a San Francisco business line

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 Francisco, 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.

The comparison below uses 18 users, the rounded average establishment size in the San Francisco, CA metro area. At list prices checked September 28, 2026, that is $449.10 a month on Ooma Office Pro and $540.00 on RingCentral RingEX Core. On Callata the same 18 people cost $359.00 a month, less than either per-seat plan.