Complete Guide to Colorado Area Codes

If you’re looking to target customers in 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.

Visual Area Code Map for Colorado

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

List of Colorado Area Codes

• 303 Area Code – Used primarily in Denver
• 720 Area Code – Overlay of 303
• 719 Area Code – Serves Pueblo and southeastern Colorado
• 970 Area Code – Serves cities in Northern Colorado

Which Cities Use Which CO Area Code?

• Aurora – 303, 720
• Boulder – 303, 720
• Greeley – 970
• Pueblo – 719

Why Are There Multiple Area Codes in Colorado?

The demand for new numbers due to business expansion led to the introduction of new codes like 970. Read more on Wikipedia.

Where is 303 Located?

303 is the original area code for Colorado. It's now still in use with 720.

How Overlay Area Codes Work in Colorado

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

How to Get a Colorado Virtual Number

Businesses can get a VoIP Colorado 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.

Colorado Area Code Lookup Tools

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 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

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.

Frequently Asked Questions

SMS enabled Colorado numbers

What cities use the 720 area code?

Cities like most of Central Colorado 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 still active?

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 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.