(303) Area Code Business Phone Numbers
The 303 area code has covered the Denver metro since 1947, and locals still treat it as the original hometown prefix. Grab one for your business and you sound like you have been around Colfax and Cherry Creek for years.
Get a 303 NumberAbout the 303 Area Code
When 303 was set up in 1947, it covered the entire state of Colorado. Growth chewed through the available numbers so fast that 720 was added as an overlay in 1998, and a third overlay, 983, joined the Denver metro pool in 2021 [1]. That is why every call inside town needs ten digits, and why a real 303 number still carries a little bit of status.
Denver is a small business town at heart. Roughly 378,000 small businesses operate in the metro area and account for about 45 percent of local jobs [2]. Whether you are running a plumbing crew out of Aurora or a design studio off South Broadway, your customers are almost always dealing with someone who signs the checks themselves.
A 303 number tells people you are one of them. Transplants keep their old area codes for years, so when a Boulder homeowner sees a 303 caller ID, they answer instead of letting it go to voicemail. That is the whole point of picking a local number with Tonet, you show up as a neighbor before the conversation even starts.
Cities Served by the 303 Area Code
The 303 area code blankets the Denver metro and a wide ring of suburbs along the Front Range. Pick any of these cities and your number will feel local to the people you call.
Phone Features Built for Denver Businesses
A 303 number is the front door. The features below are what happens after someone knocks.
Auto Attendant
Route calls to sales, service, or the shop line without paying a receptionist to sit through the slow hour after lunch.
Call Recording
Save every call for training, dispute review, or that one customer who swears they never agreed to the estimate.
AI Transcription
Voicemails and calls come back as readable text, so you can skim on the chairlift instead of holding a phone to your ear.
Business SMS
Text appointment reminders and quotes from your 303 number, which is exactly what Front Range customers expect now.
Mobile App
Take business calls on your cell without giving out your personal number, whether you are in the office or up in Vail.
Daily Billing
Plans start at $10 per user per month billed daily, and extra numbers run $2.50 each. No contracts, no annual lock in.
Frequently Asked Questions
Can I still get a real 303 number in 2026?
Yes, though inventory is tighter than it used to be because Denver metro has been on an overlay system since 1998. Tonet checks live availability when you sign up, so if a 303 is open in your city you can claim it right then.
What is the difference between 303, 720, and 983?
All three cover the same Denver metro geography. 303 came first in 1947, 720 was added in 1998, and 983 joined in 2021 to keep up with demand. Callers cannot tell them apart on the map, but 303 still reads as the original local prefix.
Do I need to live in Denver to get a 303 number?
No. If you serve customers along the Front Range, having a 303 number is often smarter than a number that matches where you happen to sleep. Your calls, texts, and voicemails all work from anywhere.
Can I port my existing 303 number to Tonet?
Yes. If you already own a 303 line through another carrier, you can bring it over without changing the number. Porting typically takes a few business days and your old service stays live until the switch completes.
How much does a 303 business line cost?
Plans start at $10 per user per month, billed daily so you only pay for the days you actually use the service. Additional phone numbers are $2.50 per month each, and there are no contracts to sign.
Sound like a Denver local from day one.
Claim your 303 number, set up your auto attendant, and start taking calls this afternoon.
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