| Call | Name | City | State | Class | Old Call | Effective Date | Expiration Date | Status |
|---|
| AA3DG | CONROY, THOMAS W | ROCKVILLE | MD | E | | 02/09/1993 | 02/09/2003 | Cancelled |
| K2HHR | BOWIE MILL AMATEUR RADIO ASSOCIATION | DERWOOD | MD | | KB3CMU | 07/31/2018 | 10/24/2028 | Active |
| K3BNS | BOWIE MILL AMATEUR RADIO ASSN | DERWOOD | MD | | W3IAJ | 03/21/2018 | 05/06/2028 | Active |
| K3GJB | BURDETTE, JOSEPH B | ROCKVILLE | MD | E | | 01/17/2018 | 03/26/2028 | Active |
| K3KY | SINCLAIR, DAVID E | DERWOOD | MD | E | K3YGU | 09/21/2016 | 11/04/2026 | Active |
| K3RAL | WILKINSON, RANDALL A L | Rockville | MD | E | W7RAL | 01/23/2018 | 01/23/2028 | Active |
| K3WVF | MC LACHLEN, WILLIAM P | DERWOOD | MD | G | | 08/01/2014 | 10/19/2024 | Active |
| K4DKC | Cubbage, Samuel J | Derwood | MD | E | KC3NLV | 07/06/2019 | 07/06/2029 | Active |
| K6PFA | ALEXANDER, PAUL F | Rockville | MD | E | WB6EHY | 09/19/2017 | 10/09/2027 | Active |
| KA3DJV | PETERSON, ROBERT L | DERWOOD | MD | E | | 09/13/2017 | 11/06/2027 | Active |
| KA3NUN | GAUDETTE, CAROLE F | ROCKVILLE | MD | N | | 03/06/2015 | 03/13/2025 | Active |
| KA7IBJ | TOMICICH, MARK A | Derwood | MD | T | | 08/20/2021 | 08/27/2031 | Active |
| KB1JUT | Drake, Bethany A | Derwood | MD | T | | 07/17/2013 | 07/17/2023 | Active |
| KB3BVU | LEWALLEN, MICHAEL A | ROCKVILLE | MD | T | | 08/02/2007 | 10/31/2017 | Expired |
| KB3CWT | BOWIE MILL AMATEUR RADIO ASSOCIATION | DERWOOD | MD | | | 07/29/1998 | 07/29/2008 | Expired |
| KB3FRW | Ginther, Joseph G | Derwood | MD | T | | 10/15/2020 | 11/04/2030 | Active |
| KB3FUJ | Field, Joel A | DERWOOD | MD | E | | 10/17/2020 | 11/28/2030 | Active |
| KB3GFL | DOULAVERIS, CONSTANTINE G | DERWOOD | MD | G | | 02/28/2001 | 02/28/2011 | Cancelled |
| KB3HFC | Rabassa, Albert | Rockville | MD | T | | 10/25/2001 | 10/25/2011 | Expired |
| KB3HSX | Birch, Anne O | Rockville | MD | G | | 03/18/2002 | 03/18/2012 | Cancelled |
| KB3NB | WILLIAMS, MICHAEL G | DERWOOD | MD | A | | 10/30/2007 | 01/22/2018 | Expired |
| KB3QQR | CHESAPEAKE QCWA CHAPTER 20 | DERWOOD | MD | | | 03/18/2008 | 03/18/2018 | Cancelled |
| KB3UUK | Pittleman, Stephen J | Derwood | MD | T | | 06/21/2010 | 06/21/2020 | Cancelled |
| KB3WEB | Pittleman, Stephen J | Derwood | MD | T | KB3UUK | 05/16/2020 | 08/10/2030 | Active |
| KB3YHY | Ponton, James W | Rockville | MD | G | | 02/08/2022 | 03/19/2032 | Active |
| KC3DFN | Hou, Jonathan M | DERWOOD | MD | T | | 07/17/2014 | 07/17/2024 | Active |
| KC3ESY | SPRIGGS, JASON W | DERWOOD | MD | T | | 04/09/2015 | 04/09/2025 | Active |
| KC3FYO | Johnson, John D | Derwood | MD | T | | 11/19/2015 | 11/19/2025 | Active |
| KC3GHG | Abuan, Jhason T | Rockville | MD | T | | 01/19/2016 | 01/19/2026 | Active |
| KC3HPI | Lehmann, Kurt | Derwood | MD | E | | 08/23/2016 | 08/23/2026 | Active |
| KC3HPJ | Lehmann, Valerie | Derwood | MD | G | | 08/23/2016 | 08/23/2026 | Active |
| KC3HUB | Applegate, Bryan D | Rockville | MD | T | | 09/19/2016 | 09/19/2026 | Active |
| KC3HXS | Ge, Xiaolan | Rockville | MD | T | | 10/11/2016 | 10/11/2026 | Active |
| KC3IHM | ELKINS, LESLIE R | Derwood | MD | T | | 12/12/2016 | 12/12/2026 | Active |
| KC3KOF | SALE, MATTHEW | DERWOOD | MD | T | | 01/08/2018 | 01/08/2028 | Active |
| KC3NLV | Cubbage, Samuel J | Derwood | MD | T | | 05/13/2019 | 05/13/2029 | Cancelled |
| KC3OIY | Steenson, Jacob | Derwood | MD | G | | 11/12/2019 | 11/12/2029 | Active |
| KC3PBE | Schoning, Franz A | Derwood | MD | G | | 03/12/2020 | 03/12/2030 | Active |
| KC3PJB | FRIEL, LIAM P | DERWOOD | MD | T | | 06/08/2020 | 06/08/2030 | Active |
| KC3RJA | Hare, John D | DERWOOD | MD | T | | 02/24/2021 | 02/24/2031 | Cancelled |
| KC3TRI | Steenson, Isaac J | Derwood | MD | T | | 03/14/2022 | 03/14/2032 | Active |
| KC3UFP | STEENSON, JOHN-HENRY | DERWOOD | MD | T | | 05/20/2022 | 05/20/2032 | Active |
| KE6ZZS | MATZKIN, AARON | ROCKVILLE | MD | T | | 10/20/2015 | 12/08/2025 | Active |
| KJ4YQF | Marchisio, Vittorio | Rockville | MD | E | | 09/11/2020 | 10/05/2030 | Active |
| KR3AB | CHESAPEAKE QCWA CHAPTER 20 | DERWOOD | MD | | KB3QQR | 03/27/2018 | 05/13/2028 | Active |
| N3AXY | HERTIG, DAVID H | DERWOOD | MD | G | | 05/15/2014 | 07/07/2024 | Active |
| N3KQQ | HERTIG, LARS R | DERWOOD | MD | T | | 12/15/2021 | 12/23/2031 | Active |
| N3NPA | FINDER, CHARLES A | ROCKVILLE | MD | T | | 08/14/2002 | 11/10/2012 | Expired |
| N3PKX | JOHNSTON, ELIZABETH R | DERWOOD | MD | T | | 04/03/2003 | 06/08/2013 | Cancelled |
| N3QIT | HERTIG, MARGIT R | DERWOOD | MD | T | | 08/21/2013 | 09/21/2023 | Active |
| N3TO | Short, Robert B | Rockville | MD | E | | 12/13/2016 | 01/27/2027 | Active |
| N3UYT | ROS, SOKUN C | Derwood | MD | T | | 05/28/2015 | 05/28/2025 | Active |
| NN3SI | SMITHSONIAN INSTN NAT MUS AMER HSTRY | Derwood | MD | | | 04/25/2003 | 07/06/2013 | Expired |
| NW2M | RABASSA III, ALBERT O | ROCKVILLE | MD | E | | 11/07/2018 | 02/03/2029 | Active |
| W1LDH | Hare, John D | DERWOOD | MD | G | KC3RJA | 03/16/2021 | 03/16/2031 | Active |
| W3BE | JOHNSTON, JOHN B | DERWOOD | MD | E | | 07/09/2015 | 09/29/2025 | Active |
| W3BEJ | JOHNSTON, ELIZABETH R | DERWOOD | MD | T | N3PKX | 10/05/2022 | 10/05/2032 | Active |
| W3CSW | FARMER JR, WILLIAM G | ROCKVILLE | MD | G | | 12/06/2017 | 02/20/2028 | Active |
| W3ITF | Larrabee, Robert D | Derwood | MD | E | | 03/09/2007 | 06/02/2017 | Expired |
| W3MEN | CONROY, THOMAS W | ROCKVILLE | MD | E | AA3DG | 12/12/2020 | 03/10/2031 | Active |
| W3VIV | COHEN, VIVIAN F | DERWOOD | MD | T | N3CGB | 12/12/2018 | 03/11/2029 | Active |
| W3XY | BARNETTE, DENLEY A | DERWOOD | MD | E | KC3RN | 08/10/2016 | 11/04/2026 | Active |
| WA3GZV | Crown, Emilie B K | ROCKVILLE | MD | A | | 01/26/2015 | 01/04/2025 | Active |
| WA3OFF | Mertz, David E | Rockville | MD | E | | 02/18/2015 | 04/17/2025 | Active |
| WA3QKC | SMITH, GORDON L | DERWOOD | MD | A | | 04/09/2018 | 05/08/2028 | Active |
| WA3WHR | Burns, David W | Derwood | MD | A | | 10/05/2015 | 11/02/2025 | Active |
| WB3BIA | Ferrell Jr, John D | Derwood | MD | G | | 05/19/2020 | 07/10/2030 | Active |
| WR3T | PETERSON, KARL R | DERWOOD | MD | E | KA3JYW | 06/28/2001 | 09/24/2011 | Expired |