Amateur Radio Callsigns in ZIP Code: 21005
| Callsign | Name | City | State | Country |
|---|---|---|---|---|
| KC3CWA | GARCIA, RENE O | ABERDEEN PROVING GND | MD | United States |
| KC3GTG | LE, KIMOANH N | APG | MD | United States |
| KC3LPF | Rainer, Joseph U | Forest Hill | MD | United States |
| KC3MGQ | WITKOWSKI, MATTHEW S | Aberdeen Proving Gro | MD | United States |
| K3AX | Weasler, Stephen | APG | MD | United States |
| KC3UPA | Gillette, John W | Aberdeen Proving Gro | MD | United States |