| Call | Name | City | State | Class | Old Call | Effective Date | Expiration Date | Status |
|---|---|---|---|---|---|---|---|---|
| AB3DW | Prisel, Dudley L | Prince Frederick | MD | E | KB3KDQ | 08/10/2013 | 08/12/2023 | Active |
| K3AWD | Dahle, Allen W | PRINCE FREDERICK | MD | E | KC3CUS | 06/03/2014 | 06/03/2024 | Active |
| K3NCR | MARENKA JR, CHARLES W | PRINCE FREDERICK | MD | E | 01/01/2013 | 03/09/2023 | Active | |
| KB3HXT | Woodard, Scott E | Prince Frederick | MD | T | 04/22/2002 | 04/22/2012 | Expired | |
| KB3JVS | Millham, Rosemary A | Prince Frederick | MD | T | 06/09/2003 | 06/09/2013 | Expired | |
| KB3KDQ | Prisel, Dudley L | Prince Frederick | MD | E | 08/12/2003 | 08/12/2013 | Cancelled | |
| KB3KWB | Duclos, Donald J | Prince Frederick | MD | T | 03/12/2004 | 03/12/2014 | Cancelled | |
| KB3SLJ | Green, John W | PRINCE FREDERICK | MD | G | 03/16/2009 | 03/16/2019 | Cancelled | |
| KC3AEN | Noell Jr, Edwin A | Prince Frederick | MD | E | 03/18/2013 | 03/18/2023 | Cancelled | |
| KC3ARB | Southern Maryland Digital Amateur Radio Club | Prince Frederick | MD | 05/28/2013 | 05/28/2023 | Active | ||
| KC3CUS | Dahle, Allen W | PRINCE FREDERICK | MD | G | 05/12/2014 | 05/12/2024 | Cancelled | |
| KC3CUW | Shull, Michael D | PRINCE FREDERICK | MD | T | 05/12/2014 | 05/12/2024 | Active | |
| KC3DAS | Noell, Monica L | PRINCE FREDERICK | MD | T | 06/16/2014 | 06/16/2024 | Active | |
| KC3EN | Noell Jr, Edwin A | Prince Frederick | MD | E | KC3AEN | 08/07/2015 | 08/07/2025 | Active |
| KC3GHN | Jones, Keith L | Prince Frederick | MD | G | 01/25/2016 | 01/25/2026 | Cancelled | |
| KC3LEW | Goins, Jeffrey | Prince Frederick | MD | G | 04/16/2018 | 04/16/2028 | Active | |
| KC3PDJ | Foy, Scott C | Prince Frederick | MD | T | 03/20/2020 | 03/20/2030 | Active | |
| KC3QQD | Johnson, Erik | Prince Frederick | MD | G | 12/01/2020 | 12/01/2030 | Active | |
| KC3RKT | Bryant, Gordon R | Prince Frederick | MD | T | 03/03/2021 | 03/03/2031 | Active | |
| KC3RKU | Bryant, Laura | Prince Frederick | MD | T | 03/03/2021 | 03/03/2031 | Active | |
| KC3RWH | Brooks, Jessica | Prince Frederick | MD | T | 04/12/2021 | 04/12/2031 | Active | |
| KC3RXZ | Piatt, Gabriel M | PRINCE FREDERICK | MD | E | 04/19/2021 | 04/19/2031 | Active | |
| KC3SRU | Charland, Andrew T | Prince Frederick | MD | T | 09/13/2021 | 09/13/2031 | Cancelled | |
| KC3WRX | Charland, Andrew T | Prince Frederick | MD | E | KC3SRU | 10/08/2021 | 10/08/2031 | Active |
| KD2ESS | Fluharty, Timothy M | Prince Frederick | MD | T | 09/24/2013 | 09/24/2023 | Active | |
| KG4LJW | SAMSON, ROBERT M | prince frederick | MD | G | 12/15/2020 | 01/24/2031 | Active | |
| N3CYX | EAGEN JR, FRANCIS C | Prince Frederick | MD | T | 09/26/2017 | 09/26/2027 | Active | |
| N3HGS | JUDGE III, CHARLES A | PRINCE FREDERICK | MD | P | 10/30/1990 | 10/30/2000 | Expired | |
| N3OCW | CARSON, FRANCIS R | Prince Frederick | MD | T | 04/09/2013 | 04/09/2023 | Active | |
| N3PPH | SHESKIN, ROBERT L | PRINCE FREDERICK | MD | G | 05/15/2013 | 06/29/2023 | Active | |
| N3YR | DICKEY, LESLIE E | PRINCE FREDERICK | MD | E | AA3SP | 08/23/2019 | 08/23/2029 | Active |
| N3ZIZ | DICKEY, M DIANNE | PRINCE FREDERICK | MD | G | 03/14/2017 | 05/14/2027 | Active | |
| W3GFF | WAHL JR, ROBERT T | PRINCE FREDERICK | MD | A | KB3AQ | 03/17/2017 | 04/08/2027 | Active |
| W3TOJ | Olenjack, David R | Prince Frederick | MD | T | WH6ECO | 05/29/2013 | 05/29/2023 | Active |
| WA3JGX | MC FADDEN, JOHN J | PRINCE FREDERICK | MD | T | 09/06/2017 | 11/24/2027 | Active | |
| WA3TYW | Ewalt, Douglas S | Prince Frederick | MD | G | 09/11/2015 | 11/28/2025 | Active | |
| WA4SUP | Jones, Keith L | Prince Frederick | MD | G | KC3GHN | 06/30/2020 | 06/30/2030 | Active |
| WD3LC | CARSKADON, DAVID L | Prince Frederick | MD | A | N0GSM | 09/17/2019 | 09/17/2029 | Active |
| WH6ECO | Olenjack, David R | Prince Frederick | MD | T | 02/28/2013 | 02/28/2023 | Cancelled |