Guide to Colorado Dialing Codes
Everything You Need to Know About CO Phone Numbers
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 VoIP number with a CO area code and why it matters.
Understanding the Area Code Regions in CO
Colorado has several telephone prefixes covering different parts of the state. These are area codes 303, 720, 719, and 970 respectively.
Breakdown of CO Phone Codes
- 303 Area Code – Used primarily in Denver
- 720 Area Code – Shares coverage with 303
- 719 Area Code – Covers Colorado Springs and surrounding areas
- 970 Area Code – Covers Fort Collins, Greeley, Grand Junction
Cities Using Colorado Area Codes
- Denver – 303, 720
- Boulder – 303, 720
- Fort Collins – 970
- Grand Junction – 970
CO Area Code Expansion Explained
The demand for new numbers due to population growth led to the need for new codes such as 720. Read more on Wikipedia.
Where is 303 Located?
303 is the original area code for Colorado. It's now still in use with 720.
What is an Overlay Area Code?
An overlay area code, like 720 over 303, allows new phone numbers without changing geographic coverage. Learn more on FCC.gov.
Buy a Colorado Area Code for Business
Businesses 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.
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.
Should You Use a Local or Toll-Free Number in CO?
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.
Business and Personal Uses of Local Numbers
- Sales and outbound calls
- Customer service or support lines
- SMS-based marketing campaigns
- Remote work call routing
Colorado Phone Numbers for VoIP
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 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.
Do people still use 970?
Yes, 970 is actively used in virtual Colorado phone number Northern and Western Colorado cities like Fort Collins and Grand Junction.
Most trusted area code for Colorado businesses?
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 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.