Colorado Area Codes
Colorado Area Codes
Blog Article
Everything You Need to Know About CO Phone Numbers
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.
Colorado Area Codes Map

Colorado has four main area 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 – Serves the Denver Metro region
- 720 Area Code – Shares coverage with 303
- 719 Area Code – Serves Pueblo and southeastern Colorado
- 970 Area Code – Northwestern and western CO
Area Code Assignment by Colorado City
- Aurora – 303, 720
- Boulder – 303, 720
- Greeley – 970
- Grand Junction – 970
Reason Behind Colorado’s Area Code Growth
The demand for new numbers due to population growth led to the introduction of new codes like 970. Read more on Wikipedia.
Facts About the 303 Code
303 is assigned in 1947 for Denver and Boulder. It's now shared with its overlay 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 SMS enabled Colorado numbers can get a VoIP Colorado number to build trust with local clients. Services like Bling’s virtual phone number platform make setup easy.
VoIP Solutions for Colorado Numbers
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.
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 get higher response rates 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
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
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 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.
Conclusion: Choosing the Right Colorado Area Code
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.
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