CO · 4 Area Codes

Colorado
Area Codes

Colorado's economy leans on aerospace, tech, and outdoor recreation, centered around Denver, Colorado Springs, and Aurora. Get a local virtual phone number with any Colorado area code — instant setup, no physical office required.

4 area codes
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// Why CO Virtual Numbers

Why businesses choose a Colorado virtual number

A local Colorado number builds trust before the call connects — and keeps costs at zero.

3×
more likely to answer

Higher pickup rates in CO

Colorado residents and businesses are significantly more likely to answer calls from a local area code than out-of-state or toll-free numbers. A local number is the first step to getting the call connected.

01 — Colorado at a Glance

Colorado, by the numbers.

Colorado received a single area code, 303, in 1947. It stayed statewide for four decades until 719 split off in 1988, covering Colorado Springs, Pueblo, and the south.

In 1995, 970 split off to cover the northern mountains, western slope, and rural plains, leaving 303 focused on the booming Denver metro.

Rather than split Denver again, regulators overlaid 720 onto 303's territory in 1998 — one of the first overlays in the US, requiring 10-digit dialing.

Did you know?

Colorado's 720, added in 1998, was one of the first overlay area codes in the entire United States — instead of redrawing Denver's map, it simply stacked a second code on the same territory as 303.

// 4 area codes

Colorado Virtual Phone Numbers

Select any area code to get a local virtual number for that region of Colorado.

// Who Uses Colorado Numbers

Industries that rely on Colorado virtual numbers

Colorado's business landscape is anchored by aerospace, tech, and outdoor recreation — but local numbers drive better outcomes across every industry.

Real Estate

Agents use local area codes to build trust with buyers and sellers. A local number signals community investment.

Sales Teams

Outbound sales teams with local codes see dramatically higher pickup rates and more productive conversations.

Customer Support

Support teams with local numbers reduce friction for customers who prefer calling a familiar prefix.

Remote & Hybrid Teams

Distributed teams maintain a consistent local brand across all Colorado markets without sharing personal numbers.

Professional Services

Lawyers, accountants, and consultants use local numbers to signal proximity and professionalism.

Small Business

Local businesses use virtual numbers to expand service areas and handle overflow without extra staff.

// Get Started

Get a Colorado number in 3 steps

Active the same day. No hardware, no contracts.

  1. 01
    Step 01

    Choose a CO area code

    Browse all Colorado area codes and pick the region that best serves your customers. Every Colorado code is available instantly.

  2. 02
    Step 02

    Select your number

    Choose from available numbers in your selected area code. Vanity and memorable options available upon request.

  3. 03
    Step 03

    Go live in under 10 minutes

    Configure call routing, business hours, and voicemail from your Rozper dashboard. Your Colorado number is active immediately.

// Complete List

All US area codes by state.

Every state and territory, every active area code. Click a state to browse its codes.

List of USA States and Their Area Codes
Showing all 52 states & territories* Spans multiple time zones — code-level zone may differ.
Frequently Asked

Colorado number questions answered.

Everything you need to know before getting a Colorado virtual phone number.

Colorado has 4 active area codes. Rozper offers virtual phone numbers for all of them — you can browse, select, and activate any Colorado area code from one dashboard.
Most Colorado numbers go live in under 10 minutes. Ask us how.

Get your Colorado number, not tomorrow.

Pick a Colorado area code, choose your number, and start calling immediately. No hardware, no contracts, no waiting.

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