Complete Guide to Colorado Area Codes

If you’re looking to establish a presence in Colorado, understanding the Colorado phone code layout is essential. This blog explains how to get a VoIP number with a CO area code and why it matters.

Understanding the Area Code Regions in CO

Colorado has four main area codes covering different parts of the state. These are 303, 720, 719, and 970.

Breakdown of CO Phone Codes

• 303 Area Code – Serves the Denver Metro region
• 720 Area Code – Overlay of 303
• 719 Area Code – Colorado Springs and southern CO
• 970 Area Code – Serves cities in Northern Colorado

Area Code Assignment by Colorado City

• Denver – 303, 720
• Colorado Springs – 719
• Greeley – 970
• Pueblo – 719

CO Area Code Expansion Explained

The demand for new numbers due to technology adoption led to the need for new codes such as 720. Read more on Wikipedia.

What is the 303 Area Code?

303 is the original area code for Colorado. It's now overlaid by 720.

Colorado Area Code Overlays

An overlay area code, like 720 over 303, allows the expansion of service without disrupting existing lines. Learn more on FCC.gov.

Get a CO Local Number Online

Businesses can get a local CO number to build trust with local clients. Services like Bling’s virtual phone number platform make setup easy.

Internet Calling with CO Area Codes

Modern businesses use VoIP phone services to assign local Colorado numbers to sales or support teams. It’s cost-effective and flexible.

Professional Phone Setup in Colorado

To fully manage calls and teams, choose a business phone system that supports routing, voicemail, SMS, and extensions – ideal for companies targeting Colorado.

How to Find an Area Code in Colorado

Use tools like AreaCodeLocations.info, AllAreaCodes, or NANPA to identify or verify area codes.

Why Local Numbers Work Best in Colorado

Local CO numbers like 303 or 970 tend to get higher response rates than toll-free numbers. Use a Colorado business phone number to increase conversions.

Business and Personal Uses of Local Numbers

• Sales and outbound calls
• Customer service or support lines
• SMS-based marketing campaigns
• Remote work call routing

Cloud Numbers with CO Codes

Choose cloud-based phone systems from Bling.cloud,RingCentral, Nextiva, or Twilio if you want scalable solutions for Colorado-based numbers.

CO Area Code FAQ Section

What cities use the 720 area code?

Cities like Denver, Boulder, Colorado virtual number Aurora, and Lakewood use the 720 overlay.

Is 719 a mobile or landline code?

It can be both. Use copyright lookup tools to verify.

Can I get a CO number if I live outside the state?

Yes, VoIP services allow you to own a Colorado number from anywhere in the world.

Do people still use 970?

Yes, 970 is actively used in Northern and Western Colorado cities like Fort Collins and Grand Junction.

Which area code should I use for my business?

303 and 720 are ideal if you're targeting Denver; 970 works best for northern cities; 719 is great for Colorado Springs.

Start with the Right Colorado Number

Getting a Colorado area code is a smart move for anyone wanting local presence in CO. Whether you need a virtual phone number, VoIP service, or a business phone system, the right area code sets the tone.