Evanston Wyoming Area Code
One area code covers Evanston: 307.
The code covering Evanston
| Area code | Primarily serves | In service |
|---|---|---|
| 307 | Cheyenne | 1947 |
Scope the codes matched to Evanston. 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
Evanston has a single code, so there is nothing to divide — every local line carries 307.
ZIP codes for the same city
Postal geography is organised separately from telephone geography, so Evanston’s 2 ZIP codes 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.