Amateur Radio Callsigns in ZIP Code: 21536
| Callsign | Name | City | State | Country |
|---|---|---|---|---|
| K3LNZ | POTOMAC AREA VHF SOCIETY | Grantsville | MD | United States |
| NV3X | LERCH JR, HARRY W | Grantsville | MD | United States |
| WA3EOQ | REYNOLDS, HOWARD W | Grantsville | MD | United States |
| KB3SMV | Russ, Wayne R | GRANTSVILLE | MD | United States |
| KU3M | BEITZEL SR, SCOTT A | GRANTSVILLE | MD | United States |