Get a local business phone number in Longmont, CO

Area codes in Longmont

With 99,818 residents in the Census 2024 estimate, Longmont sits in Boulder County, Colorado. NANPA lists 64 exchanges for its rate center across 3 area codes; 720 has the most (39, 61%). 720 is part of an overlay with 303 and 983, so a new local number in Longmont may carry any of those codes depending on which have numbers available. Longmont is in the Mountain time zone.

According to NANPA's dialing-plan data, local calls within 720 are dialed as ten digits (area code plus number) and toll calls as 1 plus ten digits.

Who holds Longmont phone exchanges

14 carriers hold the 64 exchanges assigned to Longmont's rate center. Qwest Corporation has the most, with 14. 52 of them are pooled codes, which the holder shares with other carriers in blocks of 1,000 numbers. A business number in Longmont can come from any of these blocks; once it is yours, porting lets it move between providers.

Local prefixes for Longmont

These are the central office codes NANPA records for Longmont. A caller seeing one of them recognizes a local number. The earliest assignment date recorded in the file for these codes is 2006. 19 of the 64 were assigned in 2020 or later.

When Longmont's exchanges were assigned

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

How local numbers work in Longmont

NANPA ties every exchange to a rate center. For Longmont that is LONGMONT, so a number from one of these exchanges reads as local to people in and around Longmont.

New local numbers are drawn from carrier inventory, so the exact 720 numbers available change over time; porting an existing number is free.

The local business market

Longmont is part of the Boulder, CO metro area, home to 330,000 people in 2024. County Business Patterns counted 12,990 business establishments in the Boulder, CO metro area in 2023, employing 159,619 people. The largest sectors by establishment count are professional, scientific, and technical services (2,957), health care and social assistance (1,646), and retail trade (1,139).

Setting up a Longmont 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 Longmont, 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 12-person team is the benchmark here, the rounded average establishment size in the Boulder, CO metro area. Billed per seat at month-to-month list prices (checked September 28, 2026), RingCentral RingEX Core costs $360.00 a month and Ooma Office Pro $299.40. On Callata the same 12 people cost $239.00 a month, less than either per-seat plan.