Want to establish a presence in Denver County, Colorado?
A 303 number makes it easy with MySecondLine.
Start building local connections today.
Establish your local number from the comfort of your current location, wherever that may be.
Protect your personal contact information with a dedicated second number for public use.
Replace your current number with a new one in moments.
The 303 area code was created in 1947 and has become synonymous with Denver County, Colorado. It covers iconic neighborhoods like:
Denver – the vibrant heart of the city
Aurora – a diverse and growing community
Lakewood – known for its recreational areas and parks
For generations, 303 has represented Colorado pride, offering the best of city life with fast access to the breathtaking Rocky Mountains.
The 303 area code operates in the Mountain Time Zone (MT)–the same time zone as Denver. This is important for businesses and professionals who need to stay in sync with local clients, suppliers, and partners. Whether you’re scheduling calls, running local ads, or managing customer support, having a 303 number means you’re aligned with Mountain Standard Time (MST) in winter and Mountain Daylight Time (MDT) in summer.
The 303 area code covers all of Denver County, Colorado, including:
Denver
Aurora
Lakewood
and many more.
Getting a 303 number gives your calls a familiar, local presence in one of Colorado’s busiest urban regions. It’s perfect for real estate agents, freelancers, remote workers, and anyone who wants to appear local while staying flexible.
Everything you need in one powerful solution
Get a memorable personalized phone number, e.g. 323-CHA-RLES
Your virtual phone works around the clock across all locations
Automatically filter out spam and unwanted calls
Record a custom greeting message for callers to hear when they reach your number
Connect with anyone nationwide through clear voice calls
Make overseas calls directly from your second number
Full SMS capabilities for your virtual number
Global texting with your second line
Record important calls for quality assurance or future reference
Professional voicemail for your second line
Route calls to any number you choose
Set up future calls at your convenience
Begin by creating your MySecondLine account. Choose 'Select a Preferred Phone Number' and click 'No' when asked if you only need basic features.
In the second step, locate and select the United States option, then proceed to the next screen.
For the final step, specify your preferred area code, review available numbers, and select one with your chosen package.
"This virtual phone number has been a game changer for my online shopping; I can make purchases without giving out my personal info. It's also super useful for dating apps since I can chat safely without worrying about privacy."