ZIP Code 50231 — Randall, IA
50231 is a standard (street delivery) ZIP code serving Randall, Iowa, in Hamilton County. To mail something here you only need these five digits — but the four-digit extension narrows delivery to a single point, and it is what USPS bulk postage discounts are priced on.
ZIP code 50231 at a glance
| ZIP code | 50231 |
|---|---|
| Primary city | Randall |
| State | Iowa (IA) |
| County | Hamilton FIPS 19079 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 142 |
| Coordinates | 42.237650, -93.602570 |
How ZIP+4 works in 50231
The four digits after the hyphen encode a delivery segment inside 50231. In practice one segment usually means:
- One side of one block — odd numbers on a street between two cross streets
- A single large building, or one floor of it
- A group of PO boxes, sometimes a single box
- A single business that receives enough mail to warrant its own code
That is why 50231 has no single ZIP+4: two neighbors across the street from each other usually have different ones. Enter a street address above and we will return the exact nine-digit code along with the standardized USPS address format.
Nearby ZIP codes
Showing the closest twelve. See every ZIP code within 25 miles of 50231.
| ZIP | City | Distance |
|---|---|---|
| 50248 | Story City, IA | 3.2 mi |
| 50130 | Jewell, IA | 5.7 mi |
| 50075 | Ellsworth, IA | 7.1 mi |
| 50236 | Roland, IA | 7.8 mi |
| 50105 | Gilbert, IA | 8.5 mi |
| 50230 | Radcliffe, IA | 9.3 mi |
| 50246 | Stanhope, IA | 9.7 mi |
| 50102 | Garden City, IA | 10.4 mi |
| 50132 | Kamrar, IA | 11.5 mi |
| 50154 | Mccallsburg, IA | 11.6 mi |
| 50014 | Ames, IA | 13.8 mi |
| 50010 | Ames, IA | 14.1 mi |
Questions about 50231
What is the ZIP+4 code for 50231?
50231 is the five-digit ZIP code. The ZIP+4 adds four more digits that identify a specific delivery point — usually one side of a city block, a single building, or a group of PO boxes. Because those four digits change from address to address within 50231, you need to look up a specific street address to get them.
What city is 50231?
50231 is assigned to Randall, Iowa, in Hamilton County.
Do I need to use the ZIP+4?
It is optional for ordinary mail, but it speeds up sorting and it is required for most USPS bulk-mail postage discounts. Many address-verification and e-commerce systems also use ZIP+4 to confirm a delivery point exists.
Need thousands of these?
Upload a CSV and get ZIP+4, county, carrier route, and delivery-point data appended to every row — or call the API directly.