Area code 720: where it is, and what it costs to call
720 is Denver, Colorado, on Mountain time. Calling a 720 number from anywhere in the world costs $0.02 a minute here, the same as any other ordinary US number, published before you dial and with nothing to install at either end.
Per minute in US dollars from a US caller ID. Part of a minute counts as a minute. Read live from the published card, so this figure cannot disagree with what you are charged.
01Where it is
What 720 covers
Denver and the surrounding metropolitan counties, overlaying 303 across the same area. Colorado outside the Front Range is 970 and 719, so a 720 number places you in the metro and nowhere more precise.
02Every exchange
4 exchanges in 720 are refused, not billed
The United States and Canada are sold at one flat national rate rather than priced region by region, so an area code never changes the price. What it can change is whether a particular exchange, the three digits after the area code, is carried at all. A small number of them cost many times what ordinary US traffic costs, usually rural ranges built to earn money from terminating calls, and a flat published price cannot absorb that.
720 has 4 of them (604, 606, 830, 835). Those are refused rather than billed at a surprise rate, which is the honest way to handle a range a flat price cannot carry: a call to one will not connect instead of arriving as a large charge. Everything else in 720 is $0.02 a minute. Across the 24 area codes published here the count runs from none to 17.
You can check any specific number against this in the number checker, which resolves the exact digits rather than the range.
03Line type
Is a 720 number a mobile or a landline?
There is no way to tell, and any tool that claims otherwise is guessing from a database rather than reading the number. North American numbering never separated mobiles from landlines, so 720 carries both, and a number can be ported from one to the other without a digit changing.
Almost everywhere else in the world it is readable, and it decides the price. A landline and a mobile in the same country are frequently priced several times apart, and in a surprising number of countries the landline is the dearer of the two. That is why the keypad here reads the band off the digits instead of asking you to pick one. Check any number and see which it is.
For a 720 number none of this changes the bill. Both cost $0.02 a minute.
04Getting one
Getting a 720 number of your own
US numbers rent for $5.00 a month. You search by area code, and whether 720 has anything available on the day is a question of carrier inventory rather than something we can promise in advance, so the search shows you real numbers before you pay for one. A rented number can be shown as your caller ID on outbound calls, and it receives calls and texts.
One thing it will not do: receive bank verification codes. Most institutions deliberately refuse to send two-factor codes to internet numbers, so if that is the reason you want one, this will not work and we would rather say so now. How renting a number works.
05Call one
Call a 720 number now
Type the whole number and the exact price for it appears before anything dials. Nothing to install, and the first minute is free without a card.
Type a number to see its exact price.
Sign up and call. First minute on us, no card details.
06Questions
Common questions
Where is the 720 area code?
Area code 720 is Denver, Colorado, on Mountain time. Denver and the surrounding metropolitan counties, overlaying 303 across the same area. Colorado outside the Front Range is 970 and 719, so a 720 number places you in the metro and nowhere more precise.
How much does it cost to call a 720 number?
On Airlophone a 720 number costs $0.02 a minute from a US caller ID, billed per minute with part of a minute counting as a full one, and the price is published before you dial. It is the same rate as any other ordinary US number: the United States and Canada are sold at one flat national rate rather than priced region by region, so no area code is dearer than another.
Is a 720 number a mobile or a landline?
There is no way to tell from the area code, and no service can tell you reliably. North American numbering never separated mobiles from landlines the way most countries did, so 720 covers both, and a number can be ported between the two without changing a digit. That is the opposite of how numbering works almost everywhere else, where the band is readable from the digits and the price follows it. For a US number it does not matter to the price, because both cost $0.02 a minute.
Can I get a phone number in the 720 area code?
Airlophone rents US numbers at $5.00 a month, and which area codes have inventory changes constantly, so a specific one is never guaranteed. You search by area code, take a real carrier hold on a number that is available, and set where it forwards before it is charged. A rented number can be presented as your caller ID on outbound calls and can receive calls and texts.
Call a 720 number from anywhere
$0.02 a minute, published before you dial, with nothing to install at either end. The first minute is free and needs no card.