Postal entity record
US 48109 Postal Code Data Source-backed
48109 postal code facts for Ann Arbor, US: region, coordinates, source, and nearby postal codes.
CountryUS
PlaceAnn Arbor
RegionMI
Nearby rows12
Key metadata
| Place | Ann Arbor |
|---|---|
| Admin area | Michigan / MI |
| Local area | Washtenaw |
| Coordinates | 42.2776, -83.7409 |
| 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 48109 to Ann Arbor, 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 | Ann Arbor |
| postal_code | admin_area | Michigan |
| postal_code | centroid | 42.2776, -83.7409 |
Nearby postal codes
| Code | Place | Region | Distance |
|---|---|---|---|
| 48104 | Ann Arbor | Michigan | 0.9 mi |
| 48103 | Ann Arbor | Michigan | 2.2 mi |
| 48105 | Ann Arbor | Michigan | 2.5 mi |
| 48108 | Ann Arbor | Michigan | 3.7 mi |
| 48106 | Ann Arbor | Michigan | 5.2 mi |
| 48107 | Ann Arbor | Michigan | 5.2 mi |
| 48113 | Ann Arbor | Michigan | 5.2 mi |
| 48197 | Ypsilanti | Michigan | 6.3 mi |
| 48176 | Saline | Michigan | 7.8 mi |
| 48198 | Ypsilanti | Michigan | 8.4 mi |
| 48130 | Dexter | Michigan | 9.9 mi |
| 48189 | Whitmore Lake | Michigan | 10.7 mi |