Colorado · Area code
Area Code 720Denver, CO
Area code 720 is in Colorado, United States, and serves Denver, Aurora, Littleton, Boulder and Highlands Ranch and other places nearby. Its time zone is Mountain Time.
Area code 720 at a glance
- Area code
- 720
- Main place
- Denver, CO
- State
- Colorado
- Country
- 🇺🇸 United States
- Country calling code
- +1
- Time zone
- Mountain Time (America/Denver)
- Dial from abroad
- +1 720 XXX XXXX
- Dial inside the US and Canada
- 1 720 XXX XXXX
Cities and places in area code 720
The places phone numbers beginning 720 were issued in, the most common first.
- Denver, CO
- Aurora, CO
- Littleton, CO
- Boulder, CO
- Highlands Ranch, CO
- Parker, CO
- Brighton, CO
- Broomfield, CO
- Castle Rock, CO
- Longmont, CO
Look up a 720 number
Enter a full number with area code 720: it shows the line type, place, network and time zone, and every way to write it. Free and private.
Area code 720: frequently asked questions
Where is area code 720?
Area code 720 is in Colorado, United States. It serves places including Denver, Aurora, Littleton, Boulder, Highlands Ranch, Parker, Brighton and Broomfield.
What time zone is area code 720 in?
Area code 720 is on Mountain Time. A number with this area code can belong to someone living anywhere, so the time zone tells you where the number was issued rather than where the person is.
Which country is area code 720 in?
Area code 720 belongs to the United States, part of the North American Numbering Plan. Country code +1 is shared by the United States, Canada and many Caribbean and Pacific countries; the area code decides which one a number is in.
How do I call a 720 number from another country?
Dial your country's international access code (or press + on a mobile phone), then 1, then 720, then the seven-digit number: +1 720 followed by the number. Inside the United States and Canada, dial 1 and the ten digits.
Can I tell who is calling from an area code?
No. The area code only shows where a number was first issued. People keep their numbers when they move, mobile numbers work anywhere, and callers can disguise the number they call from. To see what the numbering plan says about a specific number, use the free phone number lookup.
What other area codes are in Colorado?
Other area codes in Colorado include 303, 719, 748, 970 and 983.