Get a local business phone number in Half Moon Bay, CA

Half Moon Bay area codes

Half Moon Bay city is a Census place in San Mateo County, California, with an estimated 11,324 residents in 2024. All 21 exchanges NANPA lists for its rate center are in area code 650. Half Moon Bay is in the Pacific time zone.

According to NANPA's dialing-plan data, local calls within 650 are dialed as 1 plus ten digits and toll calls as 1 plus ten digits.

Half Moon Bay exchanges by carrier

11 carriers hold the 21 exchanges assigned to Half Moon Bay's rate center. T-mobile USA, INC. has the most, with 7. 19 of them are pooled codes, which the holder shares with other carriers in blocks of 1,000 numbers. A business number in Half Moon Bay can come from any of these blocks; once it is yours, porting lets it move between providers.

Exchanges (NPA-NXX) assigned in Half Moon Bay

These are the central office codes NANPA records for Half Moon Bay. A caller seeing one of them recognizes a local number. The earliest assignment date recorded in the file for these codes is 2002. 3 of the 21 were assigned in 2020 or later.

When Half Moon Bay's exchanges were assigned

The table groups Half Moon Bay's exchanges by the decade NANPA recorded them as assigned.

Rate centers and local calling in Half Moon Bay

What a caller sees as "local" is the area code plus prefix. In Half Moon Bay, those come from the HALFMOONBY rate center, as recorded by NANPA.

New local numbers are drawn from carrier inventory, so the exact 650 numbers available change over time; porting an existing number is free.

Businesses around Half Moon Bay

Half Moon Bay 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).

A Half Moon Bay number on Callata

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.

Porting a number you already use in Half Moon Bay is free, and business texting is available once the carrier registration (10DLC) is approved; the registration carries a one-time $49 fee. Which specific numbers are open in a given area code depends on carrier inventory at the time you sign up.

AI agents are optional: an AI receptionist or scheduler can pick up when the team is busy or closed, take a message, send a text or email, or transfer the call. They draw on prepaid AI minutes ($0.25/minute), disclose that they are AI, and outbound AI calls require prior consent and are limited to 8am–9pm.

Per-seat phone plans multiply by headcount. For the rounded average establishment size in the San Francisco, CA metro area, 18 users on RingCentral RingEX Core come to $540.00 a month and on Ooma Office Pro $449.10, at month-to-month list prices checked September 28, 2026. Callata comes to $359.00 a month for 18 users ($99 a month with 5 users included, then $20 per additional user), below both.