Duncan Arizona Area Code
One area code covers Duncan: 928.
The code covering Duncan
| Area code | Primarily serves | In service |
|---|---|---|
| 928 | Phoenix | 2001 |
Scope the codes matched to Duncan. Source geoinfo-dataset (full_dataset) ZIP→NPA (2018 snapshot) and LocalCallingGuide NPA list (2026-07 NPA list). Updated . Overlay relationships come from the numbering-plan authority; the place match is computed.
Which part of town has which code
Duncan has a single code, so there is nothing to divide — every local line carries 928.
ZIP codes for the same city
Postal geography is organised separately from telephone geography, so Duncan’s 1 ZIP code do not map onto the codes above. They are listed in full, with the county each falls in, on the postal side of the site.
Nearby places with different codes
These are the closest places to Duncan whose area codes are not the same set. If you are near one of them, a local number may carry a code that is not on the list above.
| City | Distance | Their area codes |
|---|---|---|
| Willcox Arizona area codes | 56 mi | 520 |
| Tombstone Arizona area codes | 92 mi | 520 |
| Benson Arizona area codes | 93 mi | 520 |
| Mammoth Arizona area codes | 96 mi | 520 |
| Douglas Arizona area codes | 97 mi | 520 |
| Bisbee Arizona area codes | 106 mi | 520 |
| Huachuca City Arizona area codes | 107 mi | 520 |
| Kearny Arizona area codes | 108 mi | 520 |
Straight-line distance between place reference points, not driving distance.