Rock Falls Iowa Area Code
One area code covers Rock Falls: 641.
The code covering Rock Falls
| Area code | Primarily serves | In service |
|---|---|---|
| 641 | Cedar Falls | 2000 |
Scope the codes matched to Rock Falls. 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
Rock Falls has a single code, so there is nothing to divide — every local line carries 641.
ZIP codes for the same city
Postal geography is organised separately from telephone geography, so Rock Falls’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 Rock Falls 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 |
|---|---|---|
| Greene Iowa area codes | 26 mi | 319, 641 |
| Nashua Iowa area codes | 33 mi | 319, 641 |
| Allison Iowa area codes | 35 mi | 319, 641 |
| Clarksville Iowa area codes | 36 mi | 319 |
| Britt Iowa area codes | 37 mi | 515, 641 |
| Plainfield Iowa area codes | 38 mi | 319 |
| Chester Iowa area codes | 41 mi | 563, 641 |
| Shell Rock Iowa area codes | 43 mi | 319 |
Straight-line distance between place reference points, not driving distance.