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Area code 720 · Denver, Colorado

Get a 720 phone number for your business

720 has no map of its own. It stands on the same territory as 303 and 983 — metro Denver, Boulder, and the suburbs reaching north into Adams County and south into Douglas County — with the same boundary and the same rate centres. Nothing separates a 720 line from a 303 line in reach, routing or dialling. We provision numbers on a network we own, which is why one costs $1.00 a month and is not tied to a contract.

Build a quote Check availability
$1.00 per number, per month
$5.00 one-time to port a local number in
No contract month to month, cancel any time
US-based support on our own network

What area code 720 covers

720 reaches wherever 303 reaches: Denver and its suburbs, Boulder and Longmont to the north, and the foothill towns west of the city. All of it keeps Mountain time and moves with daylight saving in spring and autumn.

  • Denver
  • Aurora
  • Littleton
  • Englewood
  • Boulder
  • Brighton
  • Arvada
  • Longmont
  • Parker
  • Lone Tree
10 communities listed in 720
2 codes share this territory
Mountain time zone, observes DST

No territory of its own

720 is not a mobile code. It is a full overlay of 303: a new number anywhere in the metro may be issued in it, on landline, VoIP or mobile lines alike, and a 720 line in Parker or Lone Tree stands on the same footing as a 303 line downtown. What it does not cover is the rest of Colorado — Colorado Springs and Pueblo are 719, Fort Collins and Greeley 970.

What the 720 part actually is

A North American number has four parts. The area code is the second, and it is the one that tells a caller roughly where you are before they have spoken to anyone.

+1
Country code North American Numbering Plan
720
Area code Called the NPA in carrier systems
555
Exchange The NXX, a block within the area code
0147
Line number The individual line on that block
The example uses the 555-0100 block, which is reserved for fiction, so it does not ring anyone.

How to get a 720 number

  1. Tell us how many you need

    Give us the area code and a quantity. We search live inventory and come back with what is actually available, including any repeating or sequential patterns worth having.

  2. Point it wherever you want

    Route it to a seat, a ring group, an auto attendant, or straight down a SIP trunk into a PBX you already own. A number is not welded to one product on our network.

  3. Register the 911 address

    Every number needs a validated street address so an emergency call reaches the right dispatcher. That is a legal requirement rather than an upsell, and it takes about a minute in the portal.

Already have a 720 number?

Bring it. Porting a local number in is $5.00 once and the number itself does not change. Numbers port out again just as freely if you ever leave, which is worth saying because not every carrier makes that straightforward.

  1. You sign the LOA

    A letter of authorization proves the number is yours to move. We prepare it and send it over; you check the details and sign.

  2. We request the port

    The request goes to your current carrier with a copy of your most recent bill, which is what they match the account details against.

  3. They confirm a date

    The losing carrier accepts the request and returns a firm order commitment date. If they reject it, it is almost always a mismatched address or account number, and we fix it and resubmit.

  4. The number cuts over

    On the agreed date the number starts ringing on our network. Your old service stays live until that moment, so there is no window where calls go nowhere.

Questions about 720 numbers

Can I get a 720 phone number?
Yes. We source local numbers in every US area code, and 720 is $1.00 per number per month with no contract. You choose the number, we provision it, and it is on your account without a wait in most cases.
Where does area code 720 cover?
720 reaches wherever 303 reaches: Denver and its suburbs, Boulder and Longmont to the north, and the foothill towns west of the city. All of it keeps Mountain time and moves with daylight saving in spring and autumn.
Do I need an office in Colorado to use a 720 number?
No. A 720 number works from anywhere, and your team can be remote or spread across several states. What the number buys you is a local presence for the people calling you, which matters because a lot of people will not pick up an unfamiliar out-of-state number.
Is 720 a mobile-only area code in Denver?
No. 720 is a general-purpose overlay of 303, open to landline, VoIP and mobile numbers alike. It carries no territory of its own and no dialling rules of its own: calls inside the metro take ten digits on 303, 720 and 983 equally. For a business, a 720 number behaves as a 303 number does.
Can I move my existing 720 number over?
Yes. Porting a local number in is $5.00 once and the number does not change. We prepare the paperwork and coordinate with your current carrier, and your existing service stays live right up to the agreed cutover.
What does a 720 number cost in total?
The number is $1.00 per month. If you also need a phone system to answer it on, seats start at $19.95 per user per month with every feature included at every tier. If you already run a PBX, point a SIP trunk at the number instead and pay per minute.

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Get a 720 number

Numbers are $1.00 a month on a network we own and operate. Price it yourself, or ask us to check what is available.

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No contract, no setup fee, and your number ports out again if you ever leave.