Telephone Area 720. .
Prefix: +1720
This prefix is distributed within the state Colorado
The largest city in the region is Denver
Time Zone: Mountain
Winter time: UTC-7
Summer time: UTC-6
Below on the map, there is indicated the largest city in the telephone area +1-720-...-.... Colorado Denver.
Phone numbers +1-720-YYY-YYYY
| Company | District | Major City | Prefix |
|---|---|---|---|
| Qwest Corporation | Denver | Denver, CO | +1-720200-SSSS |
| New Cingular Wireless PCS | Denver | Denver, CO | +1-720201-SSSS |
| Cellco Partnership DBA Verizon Wireless | Denver, CO | +1-720202-SSSS | |
| Sprint Spectrum L.p. | Jefferson | Denver, CO | +1-720203-SSSS |
| AT&T Local | Boulder | Longmont, CO | +1-720204-SSSS |
| Sprint Spectrum L.p. | Jefferson | Denver, CO | +1-720205-SSSS |
| Xo Colorado | Jefferson | Denver, CO | +1-720206-SSSS |
| Xo Colorado | Arapahoe | Englewood, CO | +1-720207-SSSS |
| Xo Colorado | Jefferson | Denver, CO | +1-720208-SSSS |
| Sprint Spectrum L.p. | Denver | Denver, CO | +1-720209-SSSS |
| Xo Colorado | Jefferson | Denver, CO | +1-720210-SSSS |
| Xo Colorado | Jefferson | Denver, CO | +1-720212-SSSS |
| Mcleodusa Telecommunications Services- Co | Denver | Denver, CO | +1-720213-SSSS |
| Mcleodusa Telecommunications Services- Co | Denver | Denver, CO | +1-720214-SSSS |
| Cellco Partnership DBA Verizon Wireless | Jefferson | Denver, CO | +1-720215-SSSS |
| Teleport Communications Group | Arapahoe | Aurora, CO | +1-720216-SSSS |
| T-mobile Usa | Jefferson | Denver, CO | +1-720217-SSSS |
| Sprint Spectrum L.p. | Jefferson | Denver, CO | +1-720218-SSSS |
| Cellco Partnership DBA Verizon Wireless | Jefferson | Denver, CO | +1-720219-SSSS |
| T-mobile Usa | Jefferson | Denver, CO | +1-720220-SSSS |
| Xo Colorado | Jefferson | Denver, CO | +1-720221-SSSS |
| Xo Colorado | Arapahoe | Englewood, CO | +1-720222-SSSS |
| Xo Colorado | Adams | Brighton, CO | +1-720223-SSSS |
| Xo Colorado | Jefferson | Denver, CO | +1-720224-SSSS |
| Xo Colorado | Jefferson | Denver, CO | +1-720225-SSSS |
| Xo Colorado | Jefferson | Denver, CO | +1-720226-SSSS |
| Xo Colorado | Jefferson | Denver, CO | +1-720227-SSSS |
| Xo Colorado | Jefferson | Denver, CO | +1-720228-SSSS |
| Xo Colorado | Jefferson | Denver, CO | +1-720229-SSSS |
| Xo Colorado | Adams | Brighton, CO | +1-720230-SSSS |
| T-mobile Usa | Jefferson | Denver, CO | +1-720231-SSSS |
| Sprint Spectrum L.p. | Denver | Denver, CO | +1-720232-SSSS |
| Sprint Spectrum L.p. | Denver | Denver, CO | +1-720233-SSSS |
| Sprint Spectrum L.p. | Denver | Denver, CO | +1-720234-SSSS |
| Sprint Spectrum L.p. | Denver | Denver, CO | +1-720235-SSSS |
| Sprint Spectrum L.p. | Denver | Denver, CO | +1-720236-SSSS |
| New Cingular Wireless PCS | Adams | Denver, CO | +1-720237-SSSS |
| T-mobile Usa | Denver | Denver, CO | +1-720238-SSSS |
| AT&T Local | Denver | Denver, CO | +1-720239-SSSS |
| Xo Colorado | Jefferson | Denver, CO | +1-720240-SSSS |
| Xo Colorado | Jefferson | Denver, CO | +1-720241-SSSS |
| Qwest Corporation | Denver, CO | +1-720242-SSSS | |
| Leap Wireless Intl DBA Cricket Comm | Denver, CO | +1-720243-SSSS | |
| New Cingular Wireless PCS | Jefferson | Denver, CO | +1-720244-SSSS |
| Xo Colorado | Arapahoe | Englewood, CO | +1-720246-SSSS |
| Xo Colorado | Adams | Brighton, CO | +1-720247-SSSS |
| Cbeyond Communications | Denver | Denver, CO | +1-720248-SSSS |
| Xo Colorado | Jefferson | Denver, CO | +1-720249-SSSS |
| Xo Colorado | Jefferson | Denver, CO | +1-720250-SSSS |
| Level 3 Communications | Arapahoe | Aurora, CO | +1-720251-SSSS |
| Sprint Spectrum L.p. | Denver | Denver, CO | +1-720252-SSSS |
| Sprint Spectrum L.p. | Denver | Denver, CO | +1-720253-SSSS |
| Sprint Spectrum L.p. | Denver | Denver, CO | +1-720254-SSSS |
| Sprint Spectrum L.p. | Denver | Denver, CO | +1-720255-SSSS |
| Sprint Spectrum L.p. | Denver | Denver, CO | +1-720256-SSSS |
| Xo Colorado | Jefferson | Denver, CO | +1-720257-SSSS |
| Teleport Communications Group | Denver | Denver, CO | +1-720258-SSSS |
| Level 3 Communications | Jefferson | Denver, CO | +1-720259-SSSS |
| Sprint Spectrum L.p. | Jefferson | Denver, CO | +1-720260-SSSS |
| T-mobile Usa | Jefferson | Denver, CO | +1-720261-SSSS |
| Icg Telecom Group | Adams | Aurora, CO | +1-720262-SSSS |
| Level 3 Communications | Adams | Brighton, CO | +1-720263-SSSS |
| Qwest Corporation | Denver | Denver, CO | +1-720264-SSSS |
| Xo Colorado | Adams | Brighton, CO | +1-720265-SSSS |
| Level 3 Communications | Jefferson | Denver, CO | +1-720266-SSSS |
| Qwest Corporation | Jefferson | Denver, CO | +1-720267-SSSS |
| Qwest Corporation | Jefferson | Denver, CO | +1-720268-SSSS |
| Teleport Communications Group | Arapahoe | Denver, CO | +1-720269-SSSS |
| Sprint Spectrum L.p. | Jefferson | Denver, CO | +1-720270-SSSS |
| Sprint Spectrum L.p. | Jefferson | Denver, CO | +1-720271-SSSS |
| New Cingular Wireless PCS | Jefferson | Denver, CO | +1-720272-SSSS |
| New Cingular Wireless PCS | Jefferson | Denver, CO | +1-720273-SSSS |
| Mcleodusa Telecommunications Services- Co | Denver | Denver, CO | +1-720274-SSSS |
| Leap Wireless Intl DBA Cricket Comm | Jefferson | Denver, CO | +1-720275-SSSS |
| Leap Wireless Intl DBA Cricket Comm | Jefferson | Denver, CO | +1-720276-SSSS |
| Icg Telecom Group | Denver | Aurora, CO | +1-720277-SSSS |
| Tw Telecom Of Colorado LLC | Arapahoe | Aurora, CO | +1-720278-SSSS |
| Tw Telecom Of Colorado LLC | Arapahoe | Denver, CO | +1-720279-SSSS |
| T-mobile Usa | Jefferson | Denver, CO | +1-720280-SSSS |
| Cellco Partnership DBA Verizon Wireless | Arapahoe | Aurora, CO | +1-720281-SSSS |
