What is the Area Code 720 Phone Number?

Area code 720 phone number, aka “Colorado area code,” is a telephone area code that covers the northern part of central Colorado, including major counties like Adams, Denver, Boulder, Gilpin, and others. It falls under the North American Numbering Plan (NANP). Currently, the 720 area code phone number serves 12 counties of Colorado, and its standard time zone is Mountain time. 

Want to establish your business’s local presence in central Colorado? But don’t know how to do it?

No worries; we are here to guide you.

The solution to your problem is getting a area code 720 phone number.  720 area code is an area code phone number in the NANP (North American Numbering Plan) that helps create a local presence in Colorado and its neighboring areas while improving your brand identity and boosting sales.

If you want to know more about the benefits of getting the area code 720 and how to get it, read this blog until the end.

History of the Area Code 720

While talking about the history of the area code 720 number, it was introduced on March 3, 1998, but was officially launched in the country on June 1, 1998. It is one of the newer area codes in the United States and began to serve Denver and Boulder areas from 1998 onwards.

Before 1998, the original area code of Colorado was 303. The 303 area code was overlaid with the 720 area code in 1988 to meet the growing demands of the emerging business. Since the 720 area code is a new version, it is common in the cities like Aurora, Boulder, Arvada, Commerce City, Lakewood, and Thornton, while 303 area code telephone numbers are used in Denver.

Where is Area Code 720 Located?

Where is Area Code 720 Located

Area code 720 is located in the northern Colorado region of the United States. The top 12 counties served by area code 720 include Adams, Arapahoe, Boulder,  Broomfield, Clear Creek, Denver, Douglas, Elbert, Gilpin, Jefferson, Park, and Weld. 

Similarly, Denver is the largest city served by area code 720. At the same time, it also covers several other major cities like  Applewood, Arvada, Aurora, Boulder, Castle Rock, Broomfield, Frederick, Derby, Denver, Louisville, etc.

How Do 720 Area Code Numbers Work?

Area code 720 works like any other area code phone number in the United States. It consists of a ten-digit number. The first three-digit of a phone number is the area code that represents the particular location of the phone number. The next seven-digit is the local phone number within the area code that routes calls to the specific cell phones. 

For example, a number with the area code 720 and the local number XXX-XXXX is a local phone number in Denver.

How to Make a Call Through an Area Code 720 Number?

How to Make a Call Through an Area Code 720 Number

If you are making a call within the 720 area zone, you can call by dialing a 7-digit telephone number without putting the 720 at the beginning. 

For example, 123 4567

Similarly, if you are making a call from outside the 720 area code but still within the United States, you can call by dialing 720 at the beginning, followed by a 7-digit telephone number.

For example, 720-123 4567

Likewise, if you are making a call from outside the USA, you can dial the country code first, followed by the 720 area and a 7-digit telephone number.

For example, +1 (720) 123 4567

List of Counties in Area Code 720

The top 12 counties covered by area code 720 are:

  • Adams, CO
  • Arapahoe, CO
  • Boulder, CO
  • Broomfield, CO
  • Clear Creek, CO
  • Denver, CO
  • Douglas, CO
  • Elbert, CO
  • Gilpin, CO
  • Jefferson, CO
  • Park, CO
  • Weld, CO

List of Cities in Area Code 720

The top 50 cities served or covered by area code 720 in Colorado include:

  • Applewood, CO
  • Arvada, CO
  • Aurora, CO
  • Berkeley, CO
  • Boulder, CO
  • Broomfield, CO
  • Brighton, CO
  • Castle Pines North, CO
  • Castle Rock, CO
  • Centennial, CO
  • Cherry Creek, CO
  • Cherry Hills Village, CO
  • Columbine, CO
  • Commerce City, CO
  • Dakota Ridge, CO
  • Denver, CO
  • Derby, CO
  • Dove Valley, CO
  • Englewood, CO
  • Erie, CO
  • Evergreen, CO
  • Fairmount, CO
  • Federal Heights, CO
  • Firestone, CO
  • Fort Lupton, CO
  • Frederick, CO
  • Golden, CO
  • Greenwood Village, CO
  • Gunbarrel, CO
  • Highlands Ranch, CO
  • Ken Caryl, CO
  • Lafayette, CO
  • Lakewood, CO
  • Littleton, CO
  • Lone Tree, CO
  • Longmont, CO
  • Louisville, CO
  • Northglenn, CO
  • Parker, CO
  • Roxborough Park, CO
  • Sheridan, CO
  • Sherrelwood, CO
  • Stonegate, CO
  • Superior, CO
  • The Pinery, CO
  • Thornton, CO
  • Twin Lakes, CO
  • Welby, CO
  • Westminster, CO
  • Wheat Ridge, CO
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Why Your Business Needs a Denver Area Code?

Why Your Business Needs a Denver Area Code

Getting a Denver area code phone number is profitable for business. With the Denver area code phone number, businesses can enhance customer service, boost sales, create a local presence, gain people’s trust, and many more. Below are some reasons why a business should consider getting a Denver area code phone numbers

1. Create a Local Presence

A Denver area code helps to create a local presence in Denver and its nearby cities, even from outside Denver, without any physical presence. For this, you simply need to buy a Denver area code number from reputable voip service provider and set up a virtual company.

This way, you can communicate directly with your prospects without moving physically and setting up office space while gaining locals’ trust through the local 720 area code phone number.

2. Brand Recognition

Getting a Denver area code phone number is the best way to create an image among the millions of local people residing in Denver and neighboring cities like Aurora, Boulder, Berkeley, Castle Rock, Louisville, Derby, Thornton, Erie, Westminster, etc. Moreover, customers are more likely to trust a company that appears local and has a local telephone number. 

3. Gain Customers Trust  

A major reason why customers prefer to deal with local businesses is the convenience of communicating and resolving any issues that may arise with local businesses quickly. And a Denver area code assures customers that they are dealing with a local company, which increases their trust in your company.

4. Marketing and Advertising Campaigns

Businesses can include a local Denver area code phone number in their marketing and advertising campaign to target audiences from Denver and its neighboring area and increase their marketing effectiveness. 

It creates an impression in the minds of potential customers that your business is close by and readily available to assist them.

5. Higher Answer Rates

When a business calls customers using the Denver area code, people perceive it as a local calling from the local business. Hence, they immediately answer calls without a second thought, resulting in higher call acceptance or answer rates.

How to Buy a Area Code 720 Phone Number?

There are many virtual number providers in the market that offer 720 area codes with specific fees and packages. Among them, Dialaxy is the best one. 

Getting area code 720 phone numbers only takes a few minutes and is an easy process with us. Follow below simple steps to buy 720 area code numbers from us:

  1. Sign up via the official website or mobile app.
  2. Login with the correct credentials to access the dashboard.
  3. Click the “My Number” option under the “Portal” menu.
  4. Select the “Buy Number” option.
  5. Choose “US” as the country and select the desired 720 area code from the list.
  6. Make payment and submit necessary documents if necessary.

Why Choose Us?

Few reasons why you should choose us as your 720 area code number provider includes:

    1. Wide range of features: We provide various features like call forwarding, call history, voicemail, IVR, call routing, call recording, etc, that help to enhance business communication.
    2. Excellent customer support: No matter whether you need assistance with step-up, troubleshooting, queries, or any other issues, we are available 24/7 to assist you.
    3. Call quality: We provide excellent call quality and ensures a reliable connection. There is significantly less chance of call drops or poor audio.
    4. Pricing plans: We provide 720 area code phone numbers at a reasonable cost. Also, you won’t have to worry about hidden fees or long-term contracts that could bind you to an unsuitable service.
    5. Flexibility: We allow you to add or cut off features and add more phone lines easily however you want in the future.


This way, getting an area code 720 is vital to enhancing business operations. It helps create a local presence in Denver and its surrounding areas, improve brand identity, increase customers’ trust, and improve the effectiveness of your marketing and advertising campaigns.

Similarly, when buying a local 720 phone number, you must buy it from a reliable provider. There are many fraudulent providers in the market that trick innocent people. We highly recommend you buy it from Dialaxy. We provide 720 area codes and many other virtual business phone numbers at a reasonable cost with top-notch features and benefits. It also provides excellent customer support.


What cities have area code 720?

Cities like Applewood, Aurora, Boulder, Brighton, Castle Rock, Centennial, Denver, Erie, Greenwood Village, Lone Tree, Sherrelwood, Parker, Longmont, Westminster, Thornton, etc, have area code 720.

When did area code 720 start?

Area code 720 started on June 1, 1998, and began to serve Denver and Boulder areas from 1998 onwards.

What is the area code for Colorado?

The area code for Colorado is 720. It is the overlaid of the 303 area code.

How do I get a local 720 phone number?

To get a local 720 phone number from virtual number service providers, take into account the following steps:

  1. Create an account and log in.
  2. Select the country as the USA from the list.
  3. Select 720 as your local area code and look for available virtual phone numbers.
  4. After selecting the number, proceed to make the necessary payment.
  5. Start using your virtual number.
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