Postal entity record
US 50401 Postal Code Data Source-backed
50401 postal code facts for Mason City, US: region, coordinates, source, and nearby postal codes.
CountryUS
PlaceMason City
RegionIA
Nearby rows12
Key metadata
| Place | Mason City |
|---|---|
| Admin area | Iowa / IA |
| Local area | Cerro Gordo |
| Coordinates | 43.1499, -93.1954 |
| 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 50401 to Mason City, 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 | Mason City |
| postal_code | admin_area | Iowa |
| postal_code | centroid | 43.1499, -93.1954 |
Nearby postal codes
| Code | Place | Region | Distance |
|---|---|---|---|
| 50402 | Mason City | Iowa | 0.4 mi |
| 50467 | Rock Falls | Iowa | 6.8 mi |
| 50464 | Plymouth | Iowa | 7.6 mi |
| 50428 | Clear Lake | Iowa | 9.6 mi |
| 50456 | Manly | Iowa | 9.6 mi |
| 50458 | Nora Springs | Iowa | 9.8 mi |
| 50469 | Rockwell | Iowa | 10.2 mi |
| 50440 | Grafton | Iowa | 12.6 mi |
| 50444 | Hanlontown | Iowa | 12.9 mi |
| 50434 | Fertile | Iowa | 13.7 mi |
| 50468 | Rockford | Iowa | 13.8 mi |
| 50482 | Ventura | Iowa | 14 mi |