Amateur Radio Callsigns in ZIP Code: 21530
| Callsign | Name | City | State | Country |
|---|---|---|---|---|
| K3WTX | WHITE, DAVID L | FLINTSTONE | MD | United States |
| N3BLP | EMERICK, JOYCE A R | FLINTSTONE | MD | United States |
| KB3LSN | Porta, Paul C | Flintstone | MD | United States |
| KB3VJO | BENNETT III, RANDOLPH C | FLINTSTONE | MD | United States |
| KB3WFB | Bennett, Cheri A | FLINTSTONE | MD | United States |
| KC3EFQ | Moran III, James D | Flintstone | MD | United States |