Understanding Colorado Dialing Codes for Business & Personal Use

If you’re looking to expand your business into Colorado, understanding the area code structure in CO 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 four main area codes covering different parts of the state. These are the codes 303, 720, 719, and 970.

Breakdown of CO Phone Codes

• 303 Area Code – Covers Denver and Boulder
• 720 Area Code – Also covers the Denver area
• 719 Area Code – Colorado Springs and southern CO
• 970 Area Code – Northwestern and western CO

Area Code Assignment by Colorado City

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

Why Are There Multiple Area Codes in Colorado?

The demand for new numbers due to business expansion led to the creation of overlay codes like 720. Read more on Wikipedia.

Facts About the 303 Code

303 is the original area code for Colorado. It's now still in use with 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.

How to Get a Colorado Virtual Number

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.

Business Phone Systems for CO Area Codes

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

Look Up a CO Phone Number

Use tools like AreaCodeLocations.info, AllAreaCodes, or NANPA to identify hosted PBX Colorado numbers or verify area codes.

Should You Use a Local or Toll-Free Number in CO?

Local CO numbers like 303 or 970 tend to feel more familiar 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

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.

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.

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.

Wrap-Up: CO Area Code Strategy

Getting a Colorado area code is a smart move for anyone serving Colorado customers. Whether you need a virtual phone number, VoIP service, or a business phone system, the right area code sets the tone.