Amateur Radio Callsigns in ZIP Code: 21655
| Callsign | Name | City | State | Country |
|---|---|---|---|---|
| N3KVA | LUSBY JR, EDMUND P | PRESTON | MD | United States |
| WA3DRC | FINN, EDWARD F | PRESTON | MD | United States |
| WA3JAX | Macey, George H | Preston | MD | United States |
| KB3RXC | Carpenter, Gary J | Preston | MD | United States |
| KB3ZPU | Chatham Jr, Stanley H | PRESTON | MD | United States |
| KW4KY | Nethercott, Joel D | Preston | MD | United States |
| KC3LRP | Fisher Jr, Jack | Preston | MD | United States |
| K3HMA | Washburn Jr, Norman W | Preston | MD | United States |
| KC3PAR | Warden Sr, Ronald K | Preston | MD | United States |