ZIP Code 21139
| Post Office City | Riderwood, MD |
|---|---|
| County | Baltimore County |
| Area Code | 410 |
| Longitude | -76.63 |
| Latitude | 39.40 |
| Radius | ~2 mile radius |
| Timezone | Eastern |
| Zip Type | PO Box |
| Post Office City | Riderwood, MD |
|---|---|
| County | Baltimore County |
| Area Code | 410 |
| Longitude | -76.63 |
| Latitude | 39.40 |
| Radius | ~2 mile radius |
| Timezone | Eastern |
| Zip Type | PO Box |