The 720 Area Code (or Area Code 720) is located in the state of CO. Area Code 720 is one of the 269 3-digit telephone area codes in the USA. It covers roughly 1.11 million unique phone numbers and 2.33 million individuals near the city of Denver
Area code 720 was put into service. Area code 720 is an overlay of area code 303.
Aurora, Brighton, Deer Trail, Denver, Englewood, Fort Lupton, Golden, Henderson, Hudson, Idaho Springs, Keenesburg, Littleton, Longmont, Lyons, Sedalia.
| PREFIX | COUNTY | CITY | CARRIER | TYPE |
|---|---|---|---|---|
| 720-425 | Denver | Denver | Cellco Partnership Dba Verizon Wireless - CO | Landline |
| 720-426 | Denver | Denver | Qwest Corporation | Landline |
| 720-427 | Adams | Aurora | T-Mobile Usa, Inc. | Wireless |
| 720-428 | Denver | Denver | Onvoy, Llc - CO | Landline |
| 720-429 | Denver | Denver | New Cingular Wireless Pcs, Llc | Wireless |
| 720-430 | Denver | Denver | At&t Local | Landline |
| 720-431 | Denver | Denver | New Cingular Wireless Pcs, Llc | Wireless |
| 720-432 | Denver | Denver | Bandwidth.com Clec, Llc - CO | Landline |
| 720-433 | Denver | Denver | Qwest Corporation | Landline |
| 720-434 | Denver | Denver | New Cingular Wireless Pcs, Llc | Wireless |
| 720-435 | Denver | Denver | New Cingular Wireless Pcs, Llc | Wireless |
| 720-436 | Denver | Denver | New Cingular Wireless Pcs, Llc | Wireless |
| 720-437 | Denver | Denver | Cellco Partnership Dba Verizon Wireless - CO | Wireless |
| 720-438 | Boulder | Longmont | Onvoy, Llc - CO | Landline |
| 720-439 | Denver | Denver | New Cingular Wireless Pcs, Llc | Wireless |
| 720-440 | Denver | Denver | New Cingular Wireless Pcs, Llc | Wireless |
| 720-441 | Denver | Denver | Bandwidth.com Clec, Llc - CO | Landline |
| 720-442 | Boulder | Longmont | Bandwidth.com Clec, Llc - CO | Landline |
| 720-443 | Denver | Denver | Bandwidth.com Clec, Llc - CO | Landline |
| 720-444 | Denver | Denver | Qwest Corporation | Landline |
| 720-445 | Denver | Denver | Cellco Partnership Dba Verizon Wireless - CO | Wireless |
| 720-446 | Denver | Denver | Xo Colorado, Llc | Landline |
| 720-447 | Denver | Denver | New Cingular Wireless Pcs, Llc | Wireless |
| 720-448 | Denver | Denver | New Cingular Wireless Pcs, Llc | Wireless |
| 720-449 | Denver | Denver | Xo Colorado, Llc | Landline |
| 720-452 | Denver | Denver | Peerless Network Of Colorado, Llc - CO | Landline |
| 720-454 | Denver | Denver | Mcleodusa Telecommunications Services, Inc.- CO | Landline |
| 720-455 | Denver | Denver | Qwest Corporation | Landline |
| 720-457 | Denver | Denver | Level 3 Communications, Llc - CO | Landline |
| 720-458 | Denver | Denver | Level 3 Telecom Of Colorado, Llc - CO | Landline |
| 720-459 | Denver | Denver | Onvoy, Llc - CO | Landline |
| 720-463 | Douglas | Sedalia | Onvoy, Llc - CO | Landline |
| 720-464 | Denver | Denver | Bandwidth.com Clec, Llc - CO | Landline |
| 720-465 | Denver | Denver | New Cingular Wireless Pcs, Llc | Wireless |
| 720-466 | Weld | Fort Lupton | New Cingular Wireless Pcs, Llc | Wireless |
| 720-468 | Denver | Denver | Level 3 Communications, Llc - CO | Landline |
| 720-469 | Denver | Denver | New Cingular Wireless Pcs, Llc | Landline |
| 720-470 | Denver | Denver | Cellco Partnership Dba Verizon Wireless - CO | Wireless |
| 720-472 | Denver | Denver | Teleport Communications America, Llc - CO | Landline |
| 720-473 | Denver | Denver | Cbeyond Communications, Llc - CO | Landline |
| 720-474 | Denver | Denver | Sprint Spectrum L.p. | Wireless |
| 720-475 | Denver | Denver | Teleport Communications America, Llc - CO | Landline |
| 720-477 | Adams | Henderson | Onvoy, Llc - CO | Landline |
| 720-478 | Denver | Denver | Level 3 Telecom Of Colorado, Llc - CO | Landline |
| 720-479 | Denver | Denver | Teleport Communications America, Llc - CO | Landline |
| 720-480 | Denver | Denver | New Cingular Wireless Pcs, Llc | Wireless |
| 720-482 | Denver | Denver | Qwest Corporation | Landline |
| 720-484 | Denver | Denver | Eschelon Telecom Of Colorado, Inc. - CO | Landline |
| 720-488 | Denver | Denver | Qwest Corporation | Landline |
| 720-489 | Denver | Denver | Qwest Corporation | Landline |
| 720-490 | Denver | Denver | Sprint Spectrum L.p. | Wireless |
| 720-491 | Boulder | Longmont | New Cingular Wireless Pcs, Llc | Wireless |
| 720-493 | Denver | Denver | Qwest Corporation | Landline |
| 720-494 | Boulder | Longmont | Qwest Corporation | Landline |
| 720-495 | Denver | Denver | New Cingular Wireless Pcs, Llc | Wireless |
| 720-496 | Denver | Denver | Level 3 Communications, Llc - CO | Landline |
| 720-497 | Jefferson | Golden | Qwest Corporation | Landline |
| 720-498 | Denver | Denver | Cellco Partnership Dba Verizon Wireless - CO | Wireless |
| 720-499 | Adams | Aurora | T-Mobile Usa, Inc. | Wireless |
| 720-502 | Denver | Denver | Comcast Phone Of Colorado, Llc - CO | Landline |
| 720-504 | Denver | Denver | Bandwidth.com Clec, Llc - CO | Landline |
| 720-505 | Adams | Aurora | Cellco Partnership Dba Verizon Wireless - CO | Wireless |
| 720-506 | Denver | Denver | Level 3 Communications, Llc - CO | Landline |
| 720-508 | Denver | Denver | Eschelon Telecom Of Colorado, Inc. - CO | Landline |
| 720-509 | Denver | Denver | Xo Colorado, Llc | Landline |
| 720-514 | Denver | Denver | Teleport Communications America, Llc - CO | Landline |
| 720-515 | Denver | Denver | Bandwidth.com Clec, Llc - CO | Landline |
| 720-519 | Denver | Denver | Teleport Communications America, Llc - CO | Landline |
| 720-521 | Denver | Denver | American Messaging Services, Llc | Wireless |
| 720-522 | Arapahoe | Englewood | Xo Colorado, Llc | Landline |
| Phone Number 720-386-1901 |
USAGE Landline |
City Idaho Springs |
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Update Time Mar-26-2026 |
| Phone Number 720-233-3101 |
USAGE Wireless |
City Denver |
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Update Time Mar-26-2026 |
| Phone Number 720-584-4671 |
USAGE Wireless |
City Denver |
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Update Time Mar-26-2026 |
| Phone Number 720-903-4814 |
USAGE Landline |
City Denver |
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Update Time Mar-26-2026 |
| Phone Number 720-456-3746 |
USAGE Landline |
City Denver |
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Update Time Mar-26-2026 |
| Phone Number 720-806-2758 |
USAGE Landline |
City Denver |
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Update Time Mar-26-2026 |
| Phone Number 720-457-5501 |
USAGE Landline |
City Denver |
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Update Time Mar-26-2026 |
| Phone Number 720-219-6709 |
USAGE Wireless |
City Denver |
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Update Time Mar-26-2026 |
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