Get a local business phone number in Los Altos Hills, CA

Area codes in Los Altos Hills

Los Altos Hills, in Santa Clara County, California, had a Census-estimated population of 8,435 in July 2024. All 3 exchanges NANPA lists for its rate center are in area code 661. Los Altos Hills is in the Pacific time zone.

According to NANPA's dialing-plan data, local calls within 661 are dialed as seven digits and toll calls as seven digits.

Who holds Los Altos Hills phone exchanges

3 carriers hold the 3 exchanges assigned to Los Altos Hills's rate center. Level 3 Communications, LLC - CA has the most, with 1. 3 of them are pooled codes, which the holder shares with other carriers in blocks of 1,000 numbers. A business number in Los Altos Hills can come from any of these blocks; once it is yours, porting lets it move between providers.

Local prefixes for Los Altos Hills

Each prefix below is a block of up to 10,000 numbers that NANPA assigned to Los Altos Hills's rate center (LOST HILLS). None were assigned in 2020 or later.

How local numbers work in Los Altos Hills

Phone numbers are tied to a rate center, the local calling area used to decide whether a call is local or toll. Los Altos Hills's numbers are rated to the LOST HILLS rate center in NANPA's records. A business number from one of the prefixes above shows up on customers' phones as a Los Altos Hills number.

If your business already has a Los Altos Hills number, porting it to Callata is free and keeps it on your cards, listings and vehicles.

The local business market

Los Altos Hills is part of the San Jose-Sunnyvale-Santa Clara, CA metro area, home to 2.0 million people in 2024. County Business Patterns counted 50,322 business establishments in the San Jose, CA metro area in 2023, employing 1,185,619 people. The largest sectors by establishment count are professional, scientific, and technical services (8,761), health care and social assistance (6,467), and accommodation and food services (5,230).

Setting up a Los Altos Hills business line

Callata is a business phone system priced at $99 a month with 5 users included, then $20 per additional user. Callata Office includes up to 3 local business numbers, unlimited inbound calling, 1,500 pooled outbound US and Canada minutes per user each month, a browser softphone that can also ring your cell, voicemail with transcription, call recording with AI summaries, business-hours routing and E911 on every number.

If you already have a number in Los Altos Hills, 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.

A 24-person team is the benchmark here, the rounded average establishment size in the San Jose, CA metro area. Billed per seat at month-to-month list prices (checked September 28, 2026), RingCentral RingEX Core costs $720.00 a month and Ooma Office Pro $598.80. On Callata the same 24 people cost $479.00 a month, less than either per-seat plan.