Everything You Need to Know About CO Phone Numbers

If you’re looking to expand toll-free vs local Colorado number your business into Colorado, understanding the Colorado phone code layout is essential. This blog explains how to get a local business number in Colorado 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 area codes 303, 720, 719, and 970 respectively.

Breakdown of CO Phone Codes

• 303 Area Code – Covers Denver and Boulder
• 720 Area Code – Overlay of 303
• 719 Area Code – Covers Colorado Springs and surrounding areas
• 970 Area Code – Northwestern and western CO

Which Cities Use Which CO Area Code?

• Denver – 303, 720
• Boulder – 303, 720
• Fort Collins – 970
• Grand Junction – 970

Why Are There Multiple Area Codes in Colorado?

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

Facts About the 303 Code

303 is assigned in 1947 for Denver and Boulder. It's now overlaid by 720.

Colorado Area Code Overlays

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

Colorado VoIP Providers

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.

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.

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.

FAQs About Colorado Area Codes

What cities use the 720 area code?

Cities like Denver Metro area 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 CO 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.

Which CO code is best for business?

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 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.