Postal entity record
US 51577 Postal Code Data Source-backed
51577 postal code facts for Walnut, US: region, coordinates, source, and nearby postal codes.
CountryUS
PlaceWalnut
RegionIA
Nearby rows12
Key metadata
| Place | Walnut |
|---|---|
| Admin area | Iowa / IA |
| Local area | Pottawattamie |
| Coordinates | 41.4623, -95.218 |
| GeoNames accuracy | 4 |
| Source | GeoNames postal code data |
| License | GeoNames postal data; provided as-is with attribution required. |
| Snapshot date | 2026-06-02 |
What this record means
This row links US 51577 to Walnut, the available admin area, centroid coordinates, source accuracy, and source snapshot metadata.
Use it as a reference-data join for cleaning CRM rows, grouping operational reports, preparing territory QA, or checking whether an imported postal value has a source-backed match.
What the centroid can support
The latitude and longitude represent a postal centroid from the source snapshot. They are useful for approximate map previews, nearby-record review, deduplication checks, and distance-based QA.
They should not be treated as an official delivery boundary, address-level geocode, tax boundary, or service-area guarantee.
Sample CSV enrichment output
| Input field | Added output | Example value |
|---|---|---|
| postal_code | matched_place | Walnut |
| postal_code | admin_area | Iowa |
| postal_code | centroid | 41.4623, -95.218 |
Nearby postal codes
| Code | Place | Region | Distance |
|---|---|---|---|
| 51552 | Marne | Iowa | 6.3 mi |
| 51521 | Avoca | Iowa | 7 mi |
| 51593 | Harlan | Iowa | 7.9 mi |
| 51536 | Hancock | Iowa | 8.5 mi |
| 51531 | Elk Horn | Iowa | 11.3 mi |
| 50022 | Atlantic | Iowa | 11.6 mi |
| 51570 | Shelby | Iowa | 12.8 mi |
| 51560 | Oakland | Iowa | 13.3 mi |
| 51537 | Harlan | Iowa | 13.4 mi |
| 51544 | Lewis | Iowa | 14 mi |
| 50042 | Brayton | Iowa | 14.1 mi |
| 51543 | Kimballton | Iowa | 14.6 mi |