| Area Code 303 Details | |
|---|---|
| Country | United States |
| State/Province | Colorado |
| Major City | Denver |
| Time Zone | Mountain (UTC-07:00) |
| Prefix | County | Phone Type | Status |
|---|---|---|---|
| 303-545 | Jefferson | Landline | Active |
| 303-546 | Jefferson | Landline | Active |
| 303-547 | Jefferson | Landline | Active |
| 303-548 | Jefferson | Cell Number | Active |
| 303-549 | Jefferson | Cell Number | Active |
| 303-550 | Jefferson | Cell Number | Active |
| 303-551 | Boulder | Landline | Active |
| 303-552 | Jefferson | Landline | Active |
| 303-553 | Jefferson | Cell Number | Active |
| 303-554 | Jefferson | Landline | Active |
| 303-555 | Used in movie | Cell Number | Active |
| 303-556 | Denver | Landline | Active |
| 303-557 | Jefferson | Landline | Active |
| 303-558 | Adams | Landline | Active |
| 303-559 | Jefferson | Cell Number | Active |
| 303-560 | Jefferson | Cell Number | Active |
| 303-561 | Denver | Landline | Active |
| 303-562 | Jefferson | Landline | Active |
| 303-563 | Denver | Landline | Active |
| 303-564 | Jefferson | Cell Number | Active |