Colorado area code
Area code 720
720 is a Colorado area code covering Denver. Check a 720 number below to see if it is mobile, landline or VoIP, and which carrier it is with today.
Verdicts describe reachability. They are not compliance checks.
- State
- Colorado
- Exchanges in use
- 786
- Thousands-blocks assigned
- 6,508
- Carriers holding numbers
- 52
An exchange is the three digits after the area code, 10,000 numbers. A thousands-block is 1,000 of them, assigned to a carrier on its own.
Rate centres in 720
A rate centre is the local area a number belongs to. Names are as NANPA files them, often abbreviated. All 12.
| Rate centre (as filed) | Exchanges |
|---|---|
| DENVER | 679 |
| LONGMONT | 39 |
| FORTLUPTON | 14 |
| GEORGETOWN | 11 |
| ALLNSPKLYN | 10 |
| DECKERS | 10 |
| KEENESBURG | 9 |
| HUDSON | 8 |
| DEER TRAIL | 3 |
| BENNETT | 1 |
| BYERS | 1 |
| STRASBURG | 1 |
Carriers 720 numbers were assigned to
The carrier NANPA lists for each exchange and thousands-block. A number can be ported to another carrier after it is assigned, so check the number itself to see its carrier today.
How a port changes the carrier on your list
| Carrier (as filed) | Exchanges | Thousands-blocks |
|---|---|---|
| T-MOBILE USA, INC. | 132 | 1,166 |
| QWEST CORPORATION | 103 | 307 |
| NEW CINGULAR WIRELESS PCS, LLC | 92 | 613 |
| CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO | 75 | 1,060 |
| ONVOY, LLC - CO | 55 | 811 |
| BANDWIDTH.COM CLEC, LLC - CO | 55 | 623 |
| MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 51 | 257 |
| LEVEL 3 COMMUNICATIONS, LLC - CO | 48 | 300 |
| TELEPORT COMMUNICATIONS AMERICA, LLC - CO | 31 | 181 |
| COMCAST IP PHONE, LLC | 21 | 273 |
Area codes that share these places
These area codes have numbers in at least half of 720's rate centres. Usually that is an overlay, added when the first area code ran short of numbers.
303983
Questions about this area code
Where is area code 720?
720 is a Colorado area code covering Denver. NANPA's report lists 786 exchanges in use across 12 rate centres.
Is 720 a mobile or a landline area code?
Both. An area code doesn't decide the line type: mobile, landline and VoIP numbers all use 720, and numbers move between carriers. Check the number itself to see what it is today.
Which area codes overlay 720?
303 and 983 have numbers in at least half of the same places as 720, so a new number there can get any of these area codes.
Can you tell me who owns a 720 number?
No. NumberLookup shows whether a number is valid, its line type, its carrier and its region, never the person or business behind it.
Source: NANPA's public central office code and thousands-block reports, refreshed weekly. Carriers are the ones the numbers were assigned to, not necessarily today's, and never the person who uses a number.
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