Colorado, United States
Mountain Time
5:44 PM
Area Code
720
State / Province
Colorado
Country
United States
Time Zone
Mountain Time
Area code 720 covers 12 cities and communities across Colorado, based on telephone company rate center data.
Use the E.164 format for clickable phone links (RFC 3966):
<a href="tel:+17205550100">+17205550100</a><a href="tel:+17205550199">+17205550199</a>Look up which exchange in Colorado a specific 720 number is homed to, and whether its block is wireline or wireless. See what a reverse lookup can establish before relying on the answer.
786 active prefixes in this area code, assigned as 7,286 thousands-blocks — pooling splits one prefix across several carriers, so each block is listed separately with the rate centre it is homed to, its carrier of record, and the switch that serves it.
Showing blocks 1–100 of 7,286
| NPA-NXX | Block | Rate centre | Type | Carrier (OCN) | Switch | LATA | LIR | Dates |
|---|---|---|---|---|---|---|---|---|
| 720-200 | A | Denver | Landline | QWEST CORPORATION (9636) | DRY CREEK | 656 | — | — |
| 720-201 | A | Denver | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | DNVRCOMD4MD | 656 | — | — |
| 720-202 | 0 | Denver | Wireless | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO (6567) | AURRCO20AMD | 656 | — | — |
| 720-202 | 1 | Denver | Wireless | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO (6567) | AURRCO20AMD | 656 | — | — |
| 720-202 | 2 | Denver | Wireless | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO (6567) | AURRCO20AMD | 656 | — | — |
| 720-202 | 3 | Denver | Wireless | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO (6567) | AURRCO20AMD | 656 | — | — |
| 720-202 | 4 | Denver | Wireless | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO (6567) | AURRCO20AMD | 656 | — | — |
| 720-202 | 5 | Denver | Wireless | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO (6567) | AURRCO20AMD | 656 | — | — |
| 720-202 | 6 | Denver | Wireless | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO (6567) | AURRCO20AMD | 656 | — | — |
| 720-202 | 7 | Denver | Wireless | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO (6567) | AURRCO20AMD | 656 | — | — |
| 720-202 | 8 | Denver | Wireless | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO (6567) | AURRCO20AMD | 656 | — | — |
| 720-202 | 9 | Denver | Wireless | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO (6567) | AURRCO20AMD | 656 | — | — |
| 720-202 | A | Denver | Wireless | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO (6567) | AURRCO20AMD | 656 | — | — |
| 720-203 | 0 | Denver | Wireless | T-MOBILE USA, INC. (6529) | DNVRCOII3MD | 656 | — | — |
| 720-203 | 1 | Denver | Wireless | T-MOBILE USA, INC. (6529) | DNVRCOII3MD | 656 | — | — |
| 720-203 | 2 | Denver | Wireless | T-MOBILE USA, INC. (6529) | DNVRCOII3MD | 656 | — | — |
| 720-203 | 3 | Denver | Wireless | T-MOBILE USA, INC. (6529) | DNVRCOII3MD | 656 | — | — |
| 720-203 | 4 | Denver | Wireless | T-MOBILE USA, INC. (6529) | DNVRCOII3MD | 656 | — | — |
| 720-203 | 5 | Denver | Wireless | T-MOBILE USA, INC. (6529) | DNVRCOII3MD | 656 | — | — |
| 720-203 | 6 | Denver | Wireless | T-MOBILE USA, INC. (6529) | DNVRCOII3MD | 656 | — | — |
| 720-203 | 7 | Denver | Wireless | T-MOBILE USA, INC. (6529) | DNVRCOII3MD | 656 | — | — |
| 720-203 | 8 | Denver | Wireless | T-MOBILE USA, INC. (6529) | DNVRCOII3MD | 656 | — | — |
| 720-203 | 9 | Denver | Wireless | T-MOBILE USA, INC. (6529) | DNVRCOII3MD | 656 | — | — |
| 720-203 | A | Denver | Wireless | T-MOBILE USA, INC. (6529) | DNVRCOII3MD | 656 | — | — |
| 720-204 | 0 | Longmont | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | DNVRCOMD4MD | 656 | — | — |
| 720-204 | 1 | Longmont | Landline or VoIP | LEVEL 3 COMMUNICATIONS, LLC - CO (6118) | DENVER | 656 | — | — |
| 720-204 | 2 | Longmont | Landline or VoIP | LEVEL 3 COMMUNICATIONS, LLC - CO (6118) | DENVER | 656 | — | — |
| 720-204 | 3 | Longmont | Landline or VoIP | LEVEL 3 COMMUNICATIONS, LLC - CO (6118) | DENVER | 656 | — | — |
| 720-204 | 4 | Longmont | Landline or VoIP | LEVEL 3 COMMUNICATIONS, LLC - CO (6118) | DENVER | 656 | — | — |
| 720-204 | 5 | Longmont | Landline or VoIP | LEVEL 3 COMMUNICATIONS, LLC - CO (6118) | DENVER | 656 | — | — |
| 720-204 | 6 | Longmont | Landline or VoIP | COMCAST IP PHONE, LLC (318J) | DNVRCOMA39Z | 656 | — | — |
| 720-204 | 7 | Longmont | Landline or VoIP | LEVEL 3 COMMUNICATIONS, LLC - CO (6118) | DENVER | 656 | — | — |
| 720-204 | 8 | Longmont | Landline or VoIP | BANDWIDTH.COM CLEC, LLC - CO (078F) | DNVRCOMAXGZ | 656 | — | — |
| 720-204 | 9 | Longmont | Wireless | ONVOY SPECTRUM, LLC (624H) | DNVRCOSOFMD | 656 | — | — |
| 720-204 | A | Longmont | Landline or VoIP | LEVEL 3 COMMUNICATIONS, LLC - CO (6118) | DENVER | 656 | — | — |
| 720-205 | 0 | Denver | Wireless | T-MOBILE USA, INC. (6529) | DNVRCOII3MD | 656 | — | — |
| 720-205 | 1 | Denver | Wireless | T-MOBILE USA, INC. (6529) | DNVRCOII3MD | 656 | — | — |
| 720-205 | 2 | Denver | Wireless | T-MOBILE USA, INC. (6529) | DNVRCOII3MD | 656 | — | — |
| 720-205 | 3 | Denver | Wireless | T-MOBILE USA, INC. (6529) | DNVRCOII3MD | 656 | — | — |
| 720-205 | 4 | Denver | Wireless | T-MOBILE USA, INC. (6529) | DNVRCOII3MD | 656 | — | — |
| 720-205 | 5 | Denver | Wireless | T-MOBILE USA, INC. (6529) | DNVRCOII3MD | 656 | — | — |
| 720-205 | 6 | Denver | Wireless | T-MOBILE USA, INC. (6529) | DNVRCOII3MD | 656 | — | — |
| 720-205 | 7 | Denver | Wireless | T-MOBILE USA, INC. (6529) | DNVRCOII3MD | 656 | — | — |
| 720-205 | 8 | Denver | Wireless | T-MOBILE USA, INC. (6529) | DNVRCOII3MD | 656 | — | — |
| 720-205 | 9 | Denver | Wireless | T-MOBILE USA, INC. (6529) | DNVRCOII3MD | 656 | — | — |
| 720-205 | A | Denver | Wireless | T-MOBILE USA, INC. (6529) | DNVRCOII3MD | 656 | — | — |
| 720-206 | 0 | Denver | Landline or VoIP | MCIMETRO ACCESS TRANSMISSION SERVICES LLC (7229) | DENVER | 656 | — | — |
| 720-206 | 1 | Denver | Landline or VoIP | MCIMETRO ACCESS TRANSMISSION SERVICES LLC (7229) | DENVER | 656 | — | — |
| 720-206 | 2 | Denver | Landline or VoIP | NUSO, LLC (732J) | DNVRCOMA53Z | 656 | — | — |
| 720-206 | 3 | Denver | Wireless | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO (6567) | AURRCO20AMD | 656 | — | — |
| 720-206 | 4 | Denver | Wireless | T-MOBILE USA, INC. (6529) | DNVRCOII3MD | 656 | — | — |
| 720-206 | 5 | Denver | Wireless | T-MOBILE USA, INC. (6529) | DNVRCOII3MD | 656 | — | — |
| 720-206 | 6 | Denver | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | DNVRCOMD4MD | 656 | — | — |
| 720-206 | 7 | Denver | Wireless | T-MOBILE USA, INC. (6529) | DNVRCOII3MD | 656 | — | — |
| 720-206 | 8 | Denver | Wireless | T-MOBILE USA, INC. (6529) | DNVRCOII3MD | 656 | — | — |
| 720-206 | 9 | Denver | Wireless | T-MOBILE USA, INC. (6529) | DNVRCOII3MD | 656 | — | — |
| 720-206 | A | Denver | Landline or VoIP | MCIMETRO ACCESS TRANSMISSION SERVICES LLC (7229) | DENVER | 656 | — | — |
| 720-207 | 0 | Denver | Landline or VoIP | MCIMETRO ACCESS TRANSMISSION SERVICES LLC (7229) | DENVER | 656 | — | — |
| 720-207 | 1 | Denver | Wireless | T-MOBILE USA, INC. (6529) | DNVRCOII3MD | 656 | — | — |
| 720-207 | 2 | Denver | Landline or VoIP | MCIMETRO ACCESS TRANSMISSION SERVICES LLC (7229) | DENVER | 656 | — | — |
| 720-207 | 3 | Denver | Wireless | T-MOBILE USA, INC. (6529) | DNVRCOII3MD | 656 | — | — |
| 720-207 | 4 | Denver | Wireless | T-MOBILE USA, INC. (6529) | DNVRCOII3MD | 656 | — | — |
| 720-207 | 5 | Denver | Landline or VoIP | MCIMETRO ACCESS TRANSMISSION SERVICES LLC (7229) | DENVER | 656 | — | — |
| 720-207 | 6 | Denver | Landline or VoIP | MCIMETRO ACCESS TRANSMISSION SERVICES LLC (7229) | DENVER | 656 | — | — |
| 720-207 | 7 | Denver | Wireless | T-MOBILE USA, INC. (6529) | DNVRCOII3MD | 656 | — | — |
| 720-207 | 8 | Denver | Wireless | T-MOBILE USA, INC. (6529) | DNVRCOII3MD | 656 | — | — |
| 720-207 | 9 | Denver | Landline or VoIP | MCIMETRO ACCESS TRANSMISSION SERVICES LLC (7229) | DENVER | 656 | — | — |
| 720-207 | A | Denver | Landline or VoIP | MCIMETRO ACCESS TRANSMISSION SERVICES LLC (7229) | DENVER | 656 | — | — |
| 720-208 | 0 | Denver | Landline or VoIP | MCIMETRO ACCESS TRANSMISSION SERVICES LLC (7229) | DENVER | 656 | — | — |
| 720-208 | 1 | Denver | Landline or VoIP | ONVOY, LLC - CO (026D) | DENVER | 656 | — | — |
| 720-208 | 2 | Denver | Landline or VoIP | MCIMETRO ACCESS TRANSMISSION SERVICES LLC (7229) | DENVER | 656 | — | — |
| 720-208 | 3 | Denver | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | DNVRCOMD4MD | 656 | — | — |
| 720-208 | 4 | Denver | Landline or VoIP | ONVOY, LLC - CO (026D) | DENVER | 656 | — | — |
| 720-208 | 5 | Denver | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | DNVRCOMD4MD | 656 | — | — |
| 720-208 | 6 | Denver | Wireless | T-MOBILE USA, INC. (6529) | DNVRCOII3MD | 656 | — | — |
| 720-208 | 7 | Denver | Landline or VoIP | MCIMETRO ACCESS TRANSMISSION SERVICES LLC (7229) | DENVER | 656 | — | — |
| 720-208 | 8 | Denver | Wireless | T-MOBILE USA, INC. (6529) | DNVRCOII3MD | 656 | — | — |
| 720-208 | 9 | Denver | Landline or VoIP | MCIMETRO ACCESS TRANSMISSION SERVICES LLC (7229) | DENVER | 656 | — | — |
| 720-208 | A | Denver | Landline or VoIP | MCIMETRO ACCESS TRANSMISSION SERVICES LLC (7229) | DENVER | 656 | — | — |
| 720-209 | 0 | Denver | Wireless | T-MOBILE USA, INC. (6529) | DNVRCOII3MD | 656 | — | — |
| 720-209 | 1 | Denver | Wireless | T-MOBILE USA, INC. (6529) | DNVRCOII3MD | 656 | — | — |
| 720-209 | 2 | Denver | Wireless | T-MOBILE USA, INC. (6529) | DNVRCOII3MD | 656 | — | — |
| 720-209 | 3 | Denver | Wireless | T-MOBILE USA, INC. (6529) | DNVRCOII3MD | 656 | — | — |
| 720-209 | 4 | Denver | Wireless | T-MOBILE USA, INC. (6529) | DNVRCOII3MD | 656 | — | — |
| 720-209 | 5 | Denver | Wireless | T-MOBILE USA, INC. (6529) | DNVRCOII3MD | 656 | — | — |
| 720-209 | 6 | Denver | Wireless | T-MOBILE USA, INC. (6529) | DNVRCOII3MD | 656 | — | — |
| 720-209 | 7 | Denver | Wireless | T-MOBILE USA, INC. (6529) | DNVRCOII3MD | 656 | — | — |
| 720-209 | 8 | Denver | Wireless | T-MOBILE USA, INC. (6529) | DNVRCOII3MD | 656 | — | — |
| 720-209 | 9 | Denver | Wireless | T-MOBILE USA, INC. (6529) | DNVRCOII3MD | 656 | — | — |
| 720-209 | A | Denver | Wireless | T-MOBILE USA, INC. (6529) | DNVRCOII3MD | 656 | — | — |
| 720-210 | 0 | Denver | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | DNVRCOMD4MD | 656 | — | — |
| 720-210 | 1 | Denver | Landline or VoIP | MCIMETRO ACCESS TRANSMISSION SERVICES LLC (7229) | DENVER | 656 | — | — |
| 720-210 | 2 | Denver | Landline or VoIP | METROPCS, INC. (5562) | DNVRCOII3MD | 656 | — | — |
| 720-210 | 3 | Denver | Wireless | T-MOBILE USA, INC. (6529) | DNVRCOII3MD | 656 | — | — |
| 720-210 | 4 | Denver | Wireless | T-MOBILE USA, INC. (6529) | DNVRCOII3MD | 656 | — | — |
| 720-210 | 5 | Denver | Landline or VoIP | LEVEL 3 COMMUNICATIONS, LLC - CO (6118) | DENVER | 656 | — | — |
| 720-210 | 6 | Denver | Wireless | T-MOBILE USA, INC. (6529) | DNVRCOII3MD | 656 | — | — |
| 720-210 | 7 | Denver | Wireless | T-MOBILE USA, INC. (6529) | DNVRCOII3MD | 656 | — | — |
| 720-210 | 8 | Denver | Wireless | T-MOBILE USA, INC. (6529) | DNVRCOII3MD | 656 | — | — |
| 720-210 | 9 | Denver | Landline or VoIP | LEVEL 3 COMMUNICATIONS, LLC - CO (6118) | DENVER | 656 | — | — |
Block-level assignments from the North American Numbering Plan administrator, via localcallingguide.com.
Assigned Prefixes
786
Assignment Blocks
7,286
Rate Centers
12
Carriers of Record
53
| Type | Blocks | Share |
|---|---|---|
| Landline | 410 | 6% |
| Landline or VoIP | 3,662 | 50% |
| Wireless | 3,214 | 44% |
| Carrier | Blocks |
|---|---|
| T-MOBILE USA, INC. | 1,298 |
| CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO | 1,132 |
| ONVOY, LLC - CO | 865 |
| NEW CINGULAR WIRELESS PCS, LLC | 705 |
| BANDWIDTH.COM CLEC, LLC - CO | 677 |
| QWEST CORPORATION | 410 |
| LEVEL 3 COMMUNICATIONS, LLC - CO | 325 |
| MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 308 |
| COMCAST IP PHONE, LLC | 294 |
| METROPCS, INC. | 276 |
| 43 other carriers | 996 |
Carrier of record for each block. Numbers ported to another carrier keep their original block assignment, so this is not a lookup of who serves a given number today.
| Rate Center | Prefixes | Blocks |
|---|---|---|
| Denver | 679 | 6,159 |
| Longmont | 39 | 409 |
| Fort Lupton | 14 | 154 |
| Georgetown | 11 | 118 |
| Allens Park-Lyons | 10 | 108 |
| Deckers | 10 | 110 |
| Keenesburg | 9 | 99 |
| Hudson | 8 | 85 |
| Deer Trail | 3 | 27 |
| Bennett | 1 | 4 |
| Byers | 1 | 2 |
| Strasburg | 1 | 11 |
A rate center is the telephone exchange area a number is homed to. It sets local calling boundaries, and is not the caller's current location.
Area code 720 is a North American Numbering Plan (NANP) telephone area code assigned to Colorado, United States. It is one of 6 area codes serving Colorado. As population and demand for phone numbers grew, the region was divided into multiple numbering plan areas to avoid exhausting the available 7-digit number pool.
Yes. 720 is an active North American Numbering Plan (NANP) area code, currently assigned to Colorado, United States. It is safe to answer or dial calls using this area code.
Area code 720 covers 12 cities and communities in Colorado, including Allens Park-Lyons, Bennett, Byers, Deckers, Deer Trail, and 7 more localities. This is based on telephone company rate center data — the geographic areas carriers use to determine local calling boundaries and to assign numbers when a business or individual requests a phone number in a specific city.
All numbers in the 720 area code observe Mountain Time (IANA timezone: America/Denver). Mountain Time is UTC−7 in winter (MST) and UTC−6 in summer (MDT). When placing a call to a 720 number from a different time zone, check the current local time above to avoid calling outside of business hours.
From within Colorado, dial the 7-digit local number directly if calling within the same rate center, or dial 1 + 720 + 7-digit number for long-distance calls within North America. From outside the US or Canada, dial your country's international exit code followed by 1 720 XXX XXXX. The country code for both the United States and Canada in NANP is +1.
Format 720 numbers using E.164 notation as required by RFC 3966: prefix with +1 and omit dashes and parentheses (e.g., +17205550100). This format ensures tel: links work correctly on all mobile browsers and VoIP apps. See the tel: URI formatting guide for complete examples.