Amateur Radio Callsigns in ZIP Code: 21150
| Callsign | Name | City | State | Country |
|---|---|---|---|---|
| KB6UNN | Tsusaki, Deborah A | Simpsonville | MD | United States |
| N0MJ | Johnson, Mark L | Simpsonville | MD | United States |
| WW6Z | Tsusaki, Donald M | Simpsonville | MD | United States |
| KB3TJG | MCPHILLIPS, LARRY E | Simpsonville | MD | United States |
| KC3JHL | Sumner, Eric M | Simpsonville | MD | United States |
| K4ON | Johnson, Emily | Simpsonville | MD | United States |
| KC3ZEH | POFFENBARGER, RYAN T | SIMPSONVILLE | MD | United States |