Everything You Need to Know About CO Phone Numbers
If you’re looking to establish a presence in Colorado, understanding the area code structure in CO is essential. This blog explains how to get a VoIP number with a CO area code and why it matters.
Colorado Area Codes Map
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 – Covers Denver and Boulder
- 720 Area Code – Overlay of 303
- 719 Area Code – Colorado Springs and southern CO
- 970 Area Code – Covers Fort Collins, Greeley, Grand Junction
Cities Using Colorado Area Codes
- Aurora – 303, 720
- Boulder – 303, 720
- Fort Collins – 970
- Grand Junction – 970
Why Are There Multiple Area Codes in Colorado?
The demand for new numbers due to technology adoption led to the need for new codes such as 720. Read more on Wikipedia.
Facts About the 303 Code
303 is assigned in 1947 for Denver and Boulder. It's now still in use with 720.
What is an Overlay Area Code?
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.
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.
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.
Look Up a CO Phone Number
Use tools like AreaCodeLocations.info, AllAreaCodes, or NANPA to identify or verify area codes.
virtual phone service ColoradoWhy 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
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.
FAQs About Colorado Area Codes
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.
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; 719 is great for Colorado Springs.
Wrap-Up: CO Area Code Strategy
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.