Denver's Original Area Code · Ported to Your Phone
Get a 303 Area Code Phone Number
Real Denver numbers, ported to your existing phone. One-time fee, no monthly charges, works with any US carrier. Trusted since 2009.
15+ Years in Business4.9★ Google Rating122+ Verified Reviews100% Money-Back Guarantee
Browse Available 303 Numbers15+
Years in Business
4.9★
Google Rating
122+
Verified Reviews
50+
Compatible Carriers
3–5 Days
Avg Port Time
The 303 Difference
Why 303 Is the Colorado Native's Code
The original Colorado area code — the mark of a real Denverite.
303 was the original area code for all of Colorado in 1947, later narrowed to metro Denver as the state grew and 719, 970, and the 720 overlay were added.
For Coloradans, a 303 is the native's number — it says you were here before the boom. Newer Denver lines get 720; a real 303 still reads as old-school Mile High City.
Born in 1947
The original area code for the entire state of Colorado, now centered on Denver.
The Native's Code
New Denver lines get the 720 overlay — a 303 signals a longtime local.
Works Anywhere
Once ported, your 303 carries Denver with you anywhere in the world.
Available Now
A Few Real 303 Numbers
Live from our current Denver inventory. Browse the full list to see everything available.
From Click to Live
4 Simple Steps to Your New 303 Number
Most customers go from purchase to live number in 3–5 business days.
1☷
Browse & Select
Pick the 303 number that fits from our live inventory.
2✉
Secure Checkout
One-time payment online. Instant email with your account number and PIN.
3☎
Submit Port Request
Give your carrier our account info — about 10 minutes. Carrier-specific instructions included.
4✓
Number Goes Live
Within 3–5 business days your 303 number is active on your phone.
Works With Everything
Compatible With 50+ US Carriers
Your 303 number ports to virtually any US carrier — wireless, VoIP, virtual apps and business systems.
Wireless
- Verizon
- T-Mobile
- AT&T
- Mint Mobile
- Cricket
- US Cellular
- Visible · Boost · MVNOs
VoIP & Business
- Google Voice
- RingCentral
- Vonage
- Nextiva · 8x8
- Twilio · Bandwidth
- Ooma · MagicJack
Virtual & Apps
- Sideline · Line2
- OpenPhone
- Microsoft Teams
- Zoom Phone
- Grasshopper
- Hushed · Burner
Landline & Other
- Verizon FiOS
- Spectrum
- Vonage (alt.)
- VoIP anywhere
As Seen In
212areacode.com has been covered by the most respected names in news — confirming what our customers already know.
Got Questions?
Frequently Asked Questions
The questions that matter most — answered clearly before you buy.
Yes, real. You own the number through your own carrier. It works on your existing phone and gets calls and texts like any number. It is not an app or virtual line — it is a real, ported phone number with a 303 area code.
One-time fee. No monthly charges. The price includes your 303 number, account credentials, porting instructions for your carrier, and 30 days of call forwarding (100 minutes). Once ported to your carrier, we never bill you again.
Wireless carriers (Verizon, T-Mobile, AT&T): 3–5 business days. VoIP providers (RingCentral, Vonage): 5–10 business days. Google Voice: 3–5 days (requires a mobile-carrier step first). Enterprise VoIP (Teams, Zoom Phone): 10–14 business days.
100% money-back guarantee. If your carrier cannot accept the port, you get a full refund. If you are not sure your carrier supports 303 porting, contact us before you buy.
No. Once on your wireless carrier, your 303 number works anywhere in the world — no geographic restrictions. Many of our customers use their numbers from outside the area to maintain a local presence.
Yes — it is yours for life. Once your 303 number is on your carrier, you can port it again to any other US carrier at any time, just like any other phone number. We do not hold the number; your carrier does, on your behalf.
No contract. No recurring commitment. The one-time fee is everything you pay us. Your ongoing monthly bill is whatever your carrier charges for your existing plan — we are not in that loop.
Still have questions? We are happy to walk you through it before you buy.
Contact UsReady to Claim Your 303?
Browse our inventory of real Denver numbers. One-time fee, no monthly charges, money-back guarantee.