| ZIP | County | State | Area Code | Time Zone |
| 80010 | Arapahoe | CO | 303 | MST |
| 80011 | Arapahoe | CO | 303 | MST |
| 80012 | Arapahoe | CO | 303 | MST |
| 80013 | Arapahoe | CO | 303 | MST |
| 80014 | Arapahoe | CO | 303 | MST |
| 80015 | Arapahoe | CO | 303 | MST |
| 80016 | Arapahoe | CO | 303 | MST |
| 80017 | Arapahoe | CO | 303 | MST |
| 80018 | Arapahoe | CO | 303 | MST |
| 80019 | Adams | CO | 303 | MST |
| 80040 | Adams | CO | 303 | MST |
| 80041 | Arapahoe | CO | 303 | MST |
| 80042 | Adams | CO | 303 | MST |
| 80044 | Arapahoe | CO | 303 | MST |
| 80045 | Adams | CO | 303 | MST |
| 80046 | Arapahoe | CO | 303 | MST |
| 80047 | Arapahoe | CO | 303 | MST |
| 80220 | Denver | CO | 303 | MST |
| 80230 | Denver | CO | 303 | MST |
| 80231 | Denver | CO | 303 | MST |
| 80247 | Denver | CO | 303 | MST |