Amateur Radio Callsigns in ZIP Code: 21673
| Callsign | Name | City | State | Country |
|---|---|---|---|---|
| K3RUQ | Meekins Jr, Tinsley | Trappe | MD | United States |
| N3OUY | SARD JR, WILLIAM A | trappe | MD | United States |
| W3TMD | Stevens, Lee M | Trappe | MD | United States |
| AB3WO | EVANS III, HARRY M | TRAPPE | MD | United States |
| KC3GXH | OConnor, Sean P | Trappe | MD | United States |
| K3RLW | Willey, Robert L | Trappe | MD | United States |
| KC3THK | Cohoon, Richard M | Trappe | MD | United States |
| KD3ACS | Carouge, David | Trappe | MD | United States |