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 Colorado virtual number and why it matters.
Visual Area Code Map for Colorado
Colorado has several telephone prefixes covering different parts of the state. These are area codes 303, 720, 719, and 970 respectively.
What Are the Main Area Codes in Colorado?
- 303 Area Code – Covers Denver and Boulder
- 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
- Aurora – 303, 720
- Colorado Springs – 719
- Greeley – 970
- Grand Junction – 970
Reason Behind Colorado’s Area Code Growth
The demand for new numbers due to population growth led to the need for new codes such as 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.
How Overlay Area Codes Work in Colorado
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 local CO 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.
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.
Colorado Area Code Lookup Tools
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.
Use Cases for Colorado 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.
CO Area Code FAQ Section
What cities use the 720 area code?
Cities like Denver, Boulder, Aurora, and Lakewood 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.
Is 970 still active?
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; SIP trunk Colorado number 719 is great for Colorado Springs.
Start with the Right Colorado Number
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.