Amateur Radio Callsigns in ZIP Code: 21632
| Callsign | Name | City | State | Country |
|---|---|---|---|---|
| N3WBS | DRENTH, CHARLES N | FEDERALSBURG | MD | United States |
| N4IWH | SAVAGE III, EDWARD B | Federalsburg | MD | United States |
| KB3KSP | Barth Jr, Milton L | FEDERALSBURG | MD | United States |
| KC3OVM | Barr, Timothy | Federalsburg | MD | United States |
| KD3BBN | Uva, Pearl X | Federalsburg | MD | United States |