Amateur Radio Callsigns in ZIP Code: 21654
| Callsign | Name | City | State | Country |
|---|---|---|---|---|
| K3ZYE | WALKER, RICHARD W | OXFORD | MD | United States |
| KA2SSE | ROBFOGEL, MARJORIE M | OXFORD | MD | United States |
| WA8WIJ | GRUBER, H THOMAS | OXFORD | MD | United States |
| KB3SHM | Stocker, Frederick R | Oxford | MD | United States |
| KC3CIU | Devlin, John | Oxford | MD | United States |
| KC3VOE | Adelman, Luke | Oxford | MD | United States |