Get a local business phone number in Mammoth Lakes, CA

What area code is Mammoth Lakes, CA?

With 7,124 residents in the Census 2024 estimate, Mammoth Lakes sits in Mono County, California. All 7 exchanges NANPA lists for its rate center are in area code 760. 760 is part of an overlay with 442, so a new local number in Mammoth Lakes may carry any of those codes depending on which have numbers available. Mammoth Lakes is in the Pacific time zone.

According to NANPA's dialing-plan data, local calls within 760 are dialed as 1 plus ten digits and toll calls as 1 plus ten digits.

Who holds Mammoth Lakes phone exchanges

5 carriers hold the 7 exchanges assigned to Mammoth Lakes's rate center. Onvoy, LLC - CA has the most, with 2. 6 of them are pooled codes, which the holder shares with other carriers in blocks of 1,000 numbers. Holding a code means NANPA assigned that block of numbers to the carrier for this rate center; individual numbers may since have been ported elsewhere.

Mammoth Lakes phone prefixes

A prefix (NXX) is the three digits after the area code. Numbers starting with these prefixes are rated as local to Mammoth Lakes. The earliest assignment date recorded in the file for these codes is 2001. 1 of the 7 were assigned in 2020 or later.

When Mammoth Lakes's exchanges were assigned

The table groups Mammoth Lakes's exchanges by the decade NANPA recorded them as assigned.

How local numbers work in Mammoth Lakes

What a caller sees as "local" is the area code plus prefix. In Mammoth Lakes, those come from the MAMMOTHLKS rate center, as recorded by NANPA.

New local numbers are drawn from carrier inventory, so the exact 760 numbers available change over time; porting an existing number is free.

Who does business near Mammoth Lakes

Mammoth Lakes is outside any Census metro or micropolitan area, so the figures below are statewide. County Business Patterns counted 1,029,689 business establishments in California in 2023, employing 16,405,436 people. The largest sectors by establishment count are professional, scientific, and technical services (143,863), health care and social assistance (132,345), and retail trade (106,675).

Setting up a Mammoth Lakes 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.

Porting a number you already use in Mammoth Lakes 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.

The comparison below uses 16 users, the rounded average establishment size in California. At list prices checked September 28, 2026, that is $399.20 a month on Ooma Office Pro and $480.00 on RingCentral RingEX Core. Callata comes to $319.00 a month for 16 users ($99 a month with 5 users included, then $20 per additional user), below both.