303 Area Code

Get a Denver, Colorado phone number

A 303 phone number is related to Denver, Colorado. Phoner: Second Phone Number, allows you to set up multiple phone numbers in minutes for any US area code that you need a number for. With Phoner you use your current mobile device so there’s no need to change your permanent address, purchase a new phone, or carry multiple mobile devices around with you. Perfect for your small business, dating communication, or buying and selling goods online.

Get your new area code 303 phone number today with Phoner on iOS, Android, or desktop. Download and start texting, calling, recording phone calls, or using caller ID lookup.

Colorado map showing location of area code 303 within the state

303 Phone Number





Major City:


The 303 area code is in Colorado, United States.

Area code 303 is in the Mountain time zone (UTC -7).

This CO area code covers central Colorado and serves Denver, Lakewood, Thornton, Arvada, Westminster, Aurora, and Centennial.

Nearby counties:

Colorado's 303 area code serves portions of 12 counties including Denver County, Arapahoe County, Jefferson County, Adams County, Boulder County, Douglas County, Broomfield County, Weld County, Elbert County, Clear Creek County, Gilpin County, and Park County.

Other nearby area codes includes:

Area Code 308 - Grand Island

Area Code 505 - Albuquerque

Area Code 575 - Las Cruces

Area Code 580 - Lawton

Area Code 719 - Colorado Springs

Area Code 970 - Fort Collins

History of 303

Area Code

The Colorado area code 303 is one of the original 86 area codes created by AT&T and the Bell System in 1947. 303 served the entire state until 1995, when 970 was introduced. Since then there have been three additional area codes added to Colorado.

Things To Do Near

Area Code 303

There are many activities for locals + visitors to see and do in the 303 area code (Denver County).

Things to do in Denver, Colorado tend to includes Red Rocks Park and Amphitheatre, Denver Art Museum, Coors Brewery and much more.

Red Rocks Park and Amphitheatre

Famous for its natural acoustics, Red Rocks is both a stunning outdoor concert venue and a beautiful park with hiking trails and geological wonders.

Denver Art Museum

This renowned museum features an extensive collection of art from around the world, including American Indian, Western, and contemporary art.

Coors Brewery

Take a tour of the Coors Brewery in nearby Golden to see the beer-making process and enjoy tastings.


in Denver

Some of the universities, colleges, higher education establishments in area code 303 are:

Colorado Christian University

Metropolitan State College of Denver

Regis University

University of Denver

University of Colorado

This is not an exhaustive list, there are additional schools that may not be included

Why do people sign up for a virtual 303 number with Phoner?

People sign up for 303 virtual US phone numbers for a number of reasons.

For business

To be seen as local vendors - local numbers are more trustworthy than out-of-state phone numbers

For marketing purpose

So customers can remember their numbers easily or to be seen as local vendors as local numbers are more trustworthy than out-of-state phone numbers


To give online dating matches a 2nd phone number until they’ve gone on a date and trust each other

To buy and sell goods

For Craigslist, Facebook, eBay purchases or sales so that people don’t have your personal information and don’t bother you after the sale or purchase has been made

Nearby Codes

Frequently asked questions about local numbers

Can I buy a local 303 Colorado phone number?

Yes you can. To purchase a 303 number, download Phoner here, select a ‘United States’ number followed by ‘Colorado’ as the state. Once you have chosen an area code you can choose a number of your choice. Once you have selected a number to make calls or send texts you can subscribe and enjoy a 3 day free trial.

What are the other Colorado local area codes?

You can find the Colorado local area codes here.

Can I port my existing 303 number to Phoner?

Yes, you can port your 303 number to Phoner. We are working on an automated process, for now please email our support team so they can manually port your number.

Why Use Phoner

Phoner allows you to purchase and activate multiple phone numbers across the US without the need for multiple phones. Get a second phone number for area code 303 - whether it’s a business phone number, dating phone number, or a phone number for buying & selling goods on Craigslist, Facebook, eBay. Select the area code 303 and start texting or calling today.