| ZIP | County | State | Area Code | Time Zone |
| 80120 | Arapahoe | CO | 303 | MST |
| 80121 | Arapahoe | CO | 303 | MST |
| 80122 | Arapahoe | CO | 303 | MST |
| 80123 | Jefferson | CO | 303 | MST |
| 80124 | Douglas | CO | 303 | MST |
| 80125 | Douglas | CO | 303 | MST |
| 80126 | Douglas | CO | 303 | MST |
| 80127 | Jefferson | CO | 303 | MST |
| 80128 | Jefferson | CO | 303 | MST |
| 80129 | Douglas | CO | 303 | MST |
| 80130 | Douglas | CO | 303 | MST |
| 80160 | Arapahoe | CO | 303 | MST |
| 80161 | Arapahoe | CO | 303 | MST |
| 80162 | Jefferson | CO | 303 | MST |
| 80163 | Douglas | CO | 303 | MST |
| 80165 | Arapahoe | CO | 303 | MST |
| 80166 | Arapahoe | CO | 303 | MST |