Area code 720
720 is Denver, Boulder, Aurora, Colorado.
Area code 720 at a glance
- State
- Colorado
- Main cities
- Denver, Boulder, Aurora, Lakewood, Littleton, Longmont, Broomfield, Castle Rock
- Time zone
- Mountain Time
- Local time now
- --:--:--
- In service since
- 1998
303 covers the exact same area as 720 — both are dialed with all 10 digits.
Get a 720 number
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Available now
- +1 720 571 2453
- +1 720 571 0981
- +1 720 784 0413
- +1 720 784 0906
- +1 720 698 9903
Call a 720 number from abroad
Call any 720 number from your browser — no SIM, no app install, and no international roaming charge.
Calls to United States start at $0.02/min from QuikRing.
Call now in your browserCalling 720 from inside the US or Canada
Dial 1, then 720, then the 7-digit number.
Calling a 720 number or a 1-800 number from outside the US or Canada? Here is how to reach it from abroad.
Frequently asked questions
Where is area code 720?
Area code 720 covers Denver, Boulder, Aurora in Colorado.
What time is it in area code 720?
Area code 720 is in the Mountain Time time zone. See the live clock above for the current local time.
Is 303 the same area as 720?
Yes. 303 is an overlay of 720 — they cover the exact same area, so every call there needs all 10 digits dialed.
How do I get an area code 720 phone number?
Sign up for QuikRing and rent one of the available 720 numbers shown above. It starts working immediately and can receive real calls and text messages.
How much does it cost to call 720 from abroad?
Calls to United States numbers, including area code 720, start at $0.02/min with QuikRing — no roaming plan or SIM needed.