Complete Guide to Colorado Area Codes

If you’re looking to expand your business into Colorado, understanding the Colorado phone code layout is essential. This blog explains how to get a Colorado virtual number and why it matters.

Understanding the Area Code Regions in CO

Colorado has a few major dialing codes covering different parts of the state. These are the codes 303, 720, 719, and 970.

What Are the Main Area Codes in Colorado?

• 303 Area Code – Used primarily in Denver
• 720 Area Code – Also covers the Denver area
• 719 Area Code – Colorado Springs and southern CO
• 970 Area Code – Serves cities in Northern Colorado

Which Cities Use Which CO Area Code?

• Denver – 303, 720
• Colorado Springs – 719
• Greeley – 970
• Grand Junction – 970

Reason Behind Colorado’s Area Code Growth

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

Where is 303 Located?

303 is one of the oldest area codes in the U.S.. It's now overlaid by 720.

What is an Overlay Area Code?

An overlay area code, like 720 over 303, allows multiple users in the same location to have unique numbers. Learn more on FCC.gov.

Get a CO Local Number Online

Businesses can get a Colorado virtual 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.

Colorado Area Code Lookup Tools

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

Benefits of Local vs 800 Numbers

Local CO numbers like 303 or 970 tend to build more trust than toll-free numbers. Use a Colorado business phone number to increase conversions.

Use Cases for Colorado Numbers

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

Set Up a VoIP Line in Colorado

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, 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 local Colorado number from anywhere in the world.

Is 970 obsolete?

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

Most trusted area code for Colorado businesses?

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

Wrap-Up: CO Area Code Strategy

Getting a Colorado area code is website a smart move for anyone looking to expand into the state. Whether you need a virtual phone number, VoIP service, or a business phone system, the right area code sets the tone.