Boulder Utah Area Code
One area code covers Boulder: 435.
The code covering Boulder
| Area code | Primarily serves | In service |
|---|---|---|
| 435 | Logan | 1997 |
Scope the codes matched to Boulder. 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
Boulder has a single code, so there is nothing to divide — every local line carries 435.
ZIP codes for the same city
Postal geography is organised separately from telephone geography, so Boulder’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 Boulder 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 |
|---|---|---|
| Junction Utah area codes | 48 mi | 385, 435, 801 |
| Moroni Utah area codes | 111 mi | 385, 435, 801 |
| Levan Utah area codes | 115 mi | 385, 801 |
| Goshen Utah area codes | 142 mi | 385, 801 |
| Santaquin Utah area codes | 143 mi | 385, 801 |
| Eureka Utah area codes | 145 mi | 385, 435, 801 |
| Payson Utah area codes | 147 mi | 385, 801 |
| Salem Utah area codes | 148 mi | 385, 801 |
Straight-line distance between place reference points, not driving distance.