Area code 303

Area code 303 is a telephone area code in Colorado, covering Arvada, Aurora, Boulder, and Brighton and 8 more. It serves 24 cities and towns. The area observes Mountain time.

State
Colorado
Local time
Mountain time
Places served
24

Cities and towns in the 303 area code

Area code 303 serves 24 listed places across Colorado. These are the largest:

Getting a 303 business phone number

A local 303 number tells customers in Colorado that you are nearby, and local numbers get answered more often than unfamiliar ones. OrderToAI provisions a 303 number for your business and its AI answers every call on it, around the clock, in your own voice and hours. You can also keep the number you already have and forward it instead.

  • A dedicated 303 number, included in your plan
  • Answered 24/7, with no after-hours surcharge
  • Books appointments, takes messages, and texts links your callers ask for
  • Transfers to you or your team whenever the caller asks for a person
Get a 303 number

See pricing for what a plan costs.

Questions about the 303 area code

Where is area code 303?
Area code 303 is located in Colorado. It covers Arvada, Aurora, Boulder, Brighton, and Broomfield and 7 more, and serves 24 cities and towns in total.
What cities use the 303 area code?
Cities in the 303 area code include Arvada, Aurora, Boulder, Brighton, Broomfield, and Castle Rock and 6 more. The largest of these is Arvada.
What time zone is area code 303 in?
Area code 303 is in Mountain time, the same zone as the rest of Colorado. If you are calling 303 from another zone, check the local hour there before you dial.
Is a call from area code 303 a scam?
Not by itself. Area code 303 is a normal geographic code assigned to Colorado, so most calls from it are ordinary local calls. Caller ID can be spoofed on any area code, so judge a call by what the caller asks for rather than by the number it came from.
How do I get a 303 phone number for my business?
OrderToAI can provision a 303 business number for you during signup, and its AI answers every call to it 24/7. You can also keep your existing number and forward it, so customers keep dialing the number they already know.
Do I need to be located in Colorado to use a 303 number?
No. A 303 number can be used from anywhere, which is why businesses serving Colorado often choose one even when their staff are elsewhere. Customers see a local number and are more likely to pick up.

Looking for a different code? See all area codes.