Guide to Colorado Dialing Codes
Complete Guide to Colorado Area Codes
If you’re looking to establish a presence in Colorado, understanding the Colorado phone code layout is essential. This blog explains how to get a Colorado virtual number and why it matters.
Colorado Area Codes Map
Colorado has four main area codes covering different parts of the state. These are 303, 720, 719, and 970.
List of Colorado Area Codes
- 303 Area Code – Used primarily in Denver
- 720 Area Code – Also covers the Denver area
- 719 Area Code – Covers Colorado Springs and surrounding areas
- 970 Area Code – Covers Fort Collins, Greeley, Grand Junction
Area Code Assignment by Colorado City
- Denver – 303, 720
- Boulder – 303, 720
- Greeley – 970
- Grand Junction – 970
Why Are There Multiple Area Codes in Colorado?
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 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 VoIP Colorado 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.
Set Up a Colorado Business Line
To fully manage calls and teams, choose a business phone system that supports routing, voicemail, SMS, and extensions – ideal website for companies targeting Colorado.
Look Up a CO Phone Number
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.
Who Uses CO Area Codes?
- 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.
CO Area Code FAQ Section
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 Colorado 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 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.