Griswold Iowa Area Code
One area code covers Griswold: 712.
The code covering Griswold
| Area code | Primarily serves | In service |
|---|---|---|
| 712 | Sioux City | 1947 |
Scope the codes matched to Griswold. 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
Griswold has a single code, so there is nothing to divide — every local line carries 712.
ZIP codes for the same city
Postal geography is organised separately from telephone geography, so Griswold’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 Griswold 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 |
|---|---|---|
| Carbon Iowa area codes | 21 mi | 641, 712 |
| Anita Iowa area codes | 24 mi | 641 |
| Bridgewater Iowa area codes | 25 mi | 641, 712 |
| Corning Iowa area codes | 27 mi | 641, 712 |
| Fontanelle Iowa area codes | 30 mi | 641 |
| Prescott Iowa area codes | 31 mi | 641 |
| Adair Iowa area codes | 32 mi | 641 |
| Greenfield Iowa area codes | 36 mi | 641 |
Straight-line distance between place reference points, not driving distance.