720 Area Code: Denver, Colorado
From the North American Numbering Plan Administrator (NANPA), checked October 13, 2026.
720 is a Denver, Colorado area code. It shares its area, north-central Colorado including metro Denver, with 303 and 983.
Local 720 numbers available
2
Twilio's number search found 2 local 720 numbers that can take calls, checked October 15, 2026. CallFlux buys its tracking numbers through Twilio. We run this search at most once a day, and one search lists at most 30 numbers.
720 area code at a glance
Places the 720 area code covers
“The 303/720 NPA currently covers the north-central portion of Colorado which includes the Denver Metropolitan area”
NANPA's map of 720 is in Planning Letter PL-563 (PDF).[14]
Rate centers NANPA lists for 720
NANPA's rate center report lists 13 rate centers for 720, as of October 13, 2026.[16]
- Allenspark-Lyons
- Bennett
- Byers
- Deckers
- Deer Trail
- Denver
- Fort Lupton
- Georgetown
- Hudson
- Keenesburg
- Longmont
- Roggen
- Strasburg
Area codes that share the 720 area
In an overlay, more than one area code serves the same area. NANPA lists 720 in the 303/720/983 overlay. So 303 and 983 serve the same area as 720.[3]
“The new 983 NPA will serve the same geographic area currently served by the existing 303/720 NPA.”
Get a local 720 tracking number
CallFlux tracking numbers are picked by area code. In the CallFlux dashboard you type 720, search the numbers available in it and choose one. Calls to that number forward to the phone you set, and you can record them, assign the number to a campaign and swap it onto your website, so each call shows which ad or page it came from.
A local tracking number is $1.15 a month, on top of a CallFlux plan.
Frequently asked questions
Where is the 720 area code?
720 is a Denver, Colorado area code. It shares its area, north-central Colorado including metro Denver, with 303 and 983.
What area codes share the 720 area?
NANPA lists 720 in the 303/720/983 overlay. So 303 and 983 serve the same area as 720.
What time zone is the 720 area code in?
NANPA lists Mountain as the predominant time zone for 720.
How do you dial a local call in the 720 area code?
NANPA lists 10 digits (the area code and the number) as the predominant way to dial a local call within 720, and 1 + 10 digits for toll calls.
When did the 720 area code start?
NANPA lists June 1, 1998 as the date 720 was placed in service.
Can I get a local 720 phone number for my business?
Yes. CallFlux tracking numbers are picked by area code: type 720 in the CallFlux dashboard, search the numbers available and choose one. Our latest search, on October 15, 2026, found 2. A local tracking number is $1.15 a month, on top of a CallFlux plan.
Sources
Every fact on this page, the words it rests on and the date it was checked. NANPA writes NPA for an area code.
[1] NANPA lists 720 as an area code in Colorado.
“LOCATION: CO”
NANPA NPA Database (file dated October 13, 2026) · checked October 13, 2026
[2] NANPA lists June 1, 1998 as the date 720 was placed in service.
“IN_SERVICE_DT: 01-Jun-1998”
NANPA NPA Database (file dated October 13, 2026) · checked October 13, 2026
[3] NANPA lists 720 as part of the 303/720/983 overlay.
“OVERLAY_COMPLEX: 303/720/983”
NANPA NPA Database (file dated October 13, 2026) · checked October 13, 2026
[4] NANPA lists 303 as the parent area code of 720.
“PARENT_NPA_ID: 303”
NANPA NPA Database (file dated October 13, 2026) · checked October 13, 2026
[5] NANPA lists Mountain as the predominant time zone of 720.
“TIME_ZONE: M”
NANPA NPA Database (file dated October 13, 2026) · checked October 13, 2026
[6] NANPA's TIME_ZONE field gives a code's predominant time zone or zones.
“Predominant time zone(s) for NPA”
NANPA NPA Database field definitions · checked October 13, 2026
[7] In NANPA's field definitions, M stands for Mountain.
“M-Mountain”
NANPA NPA Database field definitions · checked October 13, 2026
[8] NANPA lists 10 digits as the predominant way to dial a local call within 720.
“HOME_NPA_LOCAL_CALLS: 10D”
NANPA NPA Database (file dated October 13, 2026) · checked October 13, 2026
[9] NANPA's HOME_NPA_LOCAL_CALLS field gives the predominant dialing pattern for local calls.
“Predominant dialing pattern on Home NPA Local Calls”
NANPA NPA Database field definitions · checked October 13, 2026
[10] NANPA lists 1 + 10 digits as the predominant way to dial a toll call within 720.
“HOME_NPA_TOLL_CALLS: 1+10D”
NANPA NPA Database (file dated October 13, 2026) · checked October 13, 2026
[11] NANPA's HOME_NPA_TOLL_CALLS field gives the predominant dialing pattern for toll calls.
“Predominant dialing pattern on Home NPA Toll Calls”
NANPA NPA Database field definitions · checked October 13, 2026
[12] In NANPA's field definitions, 1+10D stands for 1 + 10 digits.
“1+10D - one plus ten digits”
NANPA NPA Database field definitions · checked October 13, 2026
[13] In NANPA's field definitions, 10D stands for 10 digits.
“10D - ten digits”
NANPA NPA Database field definitions · checked October 13, 2026
[14] NANPA's database points to Planning Letter PL-563 for a map of 720.
“MAP: 563”
NANPA NPA Database (file dated October 13, 2026) · checked October 13, 2026
[15] NANPA's rate center report puts 8 of 720's 13 rate centers in the Denver-Aurora-Centennial, CO Metropolitan Statistical Area.
“Denver-Aurora-Centennial, CO Metropolitan Statistical Area”
NANPA NPA Rate Center Report (created October 13, 2026) · data · checked October 13, 2026
[16] NANPA's rate center report lists 13 rate centers for 720.
“ALLENSPARK-LYONS; BENNETT; BYERS; DECKERS; DEER TRAIL; DENVER; FORT LUPTON; GEORGETOWN; HUDSON; KEENESBURG; LONGMONT; ROGGEN; STRASBURG”
NANPA NPA Rate Center Report (created October 13, 2026) · data · checked October 13, 2026
[17] NANPA describes the 303/720 area as north-central Colorado, including metro Denver.
“The 303/720 NPA currently covers the north-central portion of Colorado which includes the Denver Metropolitan area”
NANPA Planning Letter PL-563 (July 29, 2021) · checked October 13, 2026
[18] 983 serves the same area as 303 and 720.
“The new 983 NPA will serve the same geographic area currently served by the existing 303/720 NPA.”
NANPA Planning Letter PL-563 (July 29, 2021) · checked October 13, 2026
[19] NANPA's glossary uses NPA, Numbering Plan Area, for an area code.
“Numbering Plan Area (Area Code)”
NANPA glossary · checked October 13, 2026