Denver, CO business phone guide

The Denver, CO area

The Denver-Aurora-Centennial, CO metro area covers 10 counties in Colorado and had 3.1 million residents in July 2024, up 3.0% since April 2020. The U.S. population grew 2.6% over the same period. Denver County, CO is the most populous, with 729,000 people. By population it ranks 19th of the 925 metro and micropolitan areas and 17th by business establishments.

Businesses in Denver, CO

County Business Patterns counted 91,522 establishments in the area in 2023, employing 1,419,833 people in mid-March with $109.1 billion in annual payroll. That is an average of 15.5 employees per establishment. 59.3% of establishments with employees had fewer than five people. By establishment count, the largest sectors are professional, scientific, and technical services (15,561), health care and social assistance (10,010), and construction (9,143).

How Denver, CO's businesses compare

Denver, CO has 30.0 business establishments per 1,000 residents, 22.0% above the U.S. figure of 24.6. Establishments average 15.5 employees against 16.7 nationally, and payroll per employee is $76,830 (12.4% above the U.S. $68,342). 59.3% of establishments with employees have fewer than five people (U.S.: 55.5%), while 5.4% have 50 or more. Because a handful of large employers lift the average, the share of very small establishments says more about who buys a small-business phone system.

Small-business industries in Denver, CO

Of the 141 industries these guides cover, 141 have a published Census count in Denver, CO. The largest are offices of real estate agents and brokers (3,660), limited-service restaurants (2,542), and full-service restaurants (2,385). Relative to population, mortgage and nonmortgage loan brokers are the most over-represented: 10.2 per 100,000 residents against 2.9 nationally.

Which area codes serve Denver, CO

The area's named cities and towns have 1,472 NANPA-assigned exchanges across 4 area codes; 303 has the most (50%). Callata includes up to 3 local numbers, so a business serving several parts of the area can hold a number in each.

Local numbers by city

Pages for 4 cities and towns in the area list their area codes, prefixes and carriers.

Phone costs for a typical Denver, CO business

A 16-person team is the benchmark here, the rounded average establishment size in Denver, CO. Billed per seat at month-to-month list prices (checked September 28, 2026), RingCentral RingEX Core costs $480.00 a month and Ooma Office Pro $399.20. Callata comes to $319.00 a month for 16 users ($99 a month with 5 users included, then $20 per additional user), below both.

Callata in Denver, CO

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.

Porting a number you already use in Denver, CO 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.