ZIP Code 51649 — Randolph, IA
51649 is a standard (street delivery) ZIP code serving Randolph, Iowa, in Fremont 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 51649 at a glance
| ZIP code | 51649 |
|---|---|
| Primary city | Randolph |
| State | Iowa (IA) |
| County | Fremont FIPS 19071 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 346 |
| Coordinates | 40.851800, -95.535650 |
How ZIP+4 works in 51649
The four digits after the hyphen encode a delivery segment inside 51649. 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 51649 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 51649.
| ZIP | City | Distance |
|---|---|---|
| 51645 | Imogene, IA | 6.2 mi |
| 51652 | Sidney, IA | 7.4 mi |
| 51653 | Tabor, IA | 7.5 mi |
| 51639 | Farragut, IA | 9.7 mi |
| 51551 | Malvern, IA | 10 mi |
| 51654 | Thurman, IA | 11.8 mi |
| 51540 | Hastings, IA | 12.1 mi |
| 51650 | Riverton, IA | 12.4 mi |
| 51601 | Shenandoah, IA | 12.8 mi |
| 51638 | Essex, IA | 14.1 mi |
| 51533 | Emerson, IA | 15.1 mi |
| 51648 | Percival, IA | 15.9 mi |
Questions about 51649
What is the ZIP+4 code for 51649?
51649 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 51649, you need to look up a specific street address to get them.
What city is 51649?
51649 is assigned to Randolph, Iowa, in Fremont 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.