Area Code 720
Denver, CO — Colorado
Area code 720 serves Denver and Colorado. Get a local 720 number to build instant presence in this market.
Introduced in 1998 as an overlay on the 303 code for the Denver metro. It was one of the West's earliest overlays.
State
Colorado (CO)
Capital: Denver
Time Zone
MT
Mountain Time (MT)
Region
West
US Census region
Code Type
Overlay
Added for capacity
Where does area code 720 cover?
Area code 720 serves communities across Colorado. Cities below represent the primary coverage area per the NANP.
- Denver
- Aurora
- Arvada
- Westminster
- Thornton
Colorado phone number landscape
Colorado's four area codes cover Denver's thriving startup scene, Boulder's tech corridor, Colorado Springs' military and aerospace community, and the state's expansive western slope.
Number format
When dialing from outside the US, prefix with +1. Within the US, dial all 10 digits including the area code.
History of Area Code 720
Introduced in 1998 as an overlay on the 303 code for the Denver metro. It was one of the West's earliest overlays.
Why get a 720 area code number?
A local 720 number gives your business a genuine connection to the Colorado market — without the overhead of a physical location.
Local Market Access
Reach Denver customers and businesses with a familiar local number. Denver's booming aerospace, cannabis, and tech economy keeps drawing new businesses to the metro. Tech and aerospace firms increasingly carry 720 numbers as 303 fills up.
Professional Credibility
A 720 number anchors your business in Denver and Colorado, giving clients and partners a recognizable local point of contact that builds immediate professional trust.
Higher Answer Rates
Local area codes are far less likely to be blocked. A 720 number keeps your outreach out of the spam folder.
Flexible Operations
Start with one 720 number and add more as you grow — all managed from a single letsdial dashboard.
How to obtain a 720 phone number.
Step 01 · Sign up
Claim your 720 number in seconds.
Enter your email or sign in with Google — your 720 number for the Colorado area is ready to claim immediately after, no lengthy forms.
Create your account
Free for 14 days. No card required to start.
Benefits of a local Colorado number
A 720 area code tells Colorado customers you're local and easy to reach.
- Local 720 numbers get answered more often than toll-free or out-of-state calls.
- Build local trust and brand recognition without a physical office.
- Keep your personal number private with a dedicated 720 business line.
Why local numbers win
Frequently asked about 720
Area code 720 covers Denver, Aurora, Arvada, Westminster, Thornton in Colorado. It is an overlay code, meaning it serves the same geographic area as an existing area code in the region.
Ready to call Colorado your market?
Get a local 720 number for your business in minutes. No contracts, no hardware — just a trusted local presence in Colorado from day one.
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