Colorado Area Codes
Colorado Area Codes
Blog Article
Complete Guide to Colorado Area Codes
If you’re looking to establish a presence in Colorado, understanding the Colorado area code system is essential. This blog explains how to get a local business number in Colorado and why it matters.
Visual Area Code Map for Colorado

Colorado has four main area codes covering different parts of the state. These are the codes 303, 720, 719, and 970.
List of Colorado Area Codes
- 303 Area Code – Covers Denver and Boulder
- 720 Area Code – Shares coverage with 303
- 719 Area Code – Serves Pueblo and southeastern Colorado
- 970 Area Code – Serves cities in Northern Colorado
Which Cities Use Which CO Area Code?
- 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 technology adoption led to the need for new codes such as 720. Read more on Wikipedia.
Facts About the 303 Code
303 is one of the oldest area codes in the U.S.. It's now still in use with 720.
How Overlay Area Codes Work in Colorado
An overlay area code, like 720 over 303, check here allows the expansion of service without disrupting existing lines. Learn more on FCC.gov.
How to Get a Colorado Virtual Number
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.
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.
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 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.
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.
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