Postal entity record
US 57730 Postal Code Data Source-backed
57730 postal code facts for Custer, US: region, coordinates, source, and nearby postal codes.
CountryUS
PlaceCuster
RegionSD
Nearby rows12
Key metadata
| Place | Custer |
|---|---|
| Admin area | South Dakota / SD |
| Local area | Custer |
| Coordinates | 43.6573, -103.4258 |
| 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 57730 to Custer, 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 | Custer |
| postal_code | admin_area | South Dakota |
| postal_code | centroid | 43.6573, -103.4258 |
Nearby postal codes
| Code | Place | Region | Distance |
|---|---|---|---|
| 57773 | Pringle | South Dakota | 9.1 mi |
| 57738 | Fairburn | South Dakota | 10.6 mi |
| 57722 | Buffalo Gap | South Dakota | 12.4 mi |
| 57744 | Hermosa | South Dakota | 15.6 mi |
| 57751 | Keystone | South Dakota | 15.8 mi |
| 57747 | Hot Springs | South Dakota | 16.4 mi |
| 57745 | Hill City | South Dakota | 20.8 mi |
| 57766 | Oral | South Dakota | 22.2 mi |
| 57702 | Rapid City | South Dakota | 24.2 mi |
| 57782 | Smithwick | South Dakota | 26.7 mi |
| 57709 | Rapid City | South Dakota | 29.4 mi |
| 57703 | Rapid City | South Dakota | 29.7 mi |