| Area Code 720 Details | |
|---|---|
| Country | United States |
| State/Province | Colorado |
| Major City | Denver |
| Time Zone | Mountain |
| Prefix | County | Phone Type | Status |
|---|---|---|---|
| 720-426 | Denver | Landline | Active |
| 720-427 | Arapahoe | Cell Number | Active |
| 720-428 | Jefferson | Landline | Active |
| 720-429 | Jefferson | Cell Number | Active |
| 720-430 | Denver | Landline | Active |
| 720-431 | Jefferson | Cell Number | Active |
| 720-432 | Denver | Landline | Active |
| 720-433 | Jefferson | Landline | Active |
| 720-434 | Denver | Cell Number | Active |
| 720-435 | Arapahoe | Cell Number | Active |
| 720-436 | Jefferson | Cell Number | Active |
| 720-437 | Jefferson | Cell Number | Active |
| 720-438 | Boulder | Landline | Active |
| 720-439 | Jefferson | Cell Number | Active |
| 720-440 | Denver | Cell Number | Active |
| 720-441 | Denver | Landline | Active |
| 720-442 | Boulder | Landline | Active |
| 720-443 | Denver | Landline | Active |
| 720-444 | Denver | Landline | Active |
| 720-445 | Denver | Cell Number | Active |