The Federal Communications Commission (FCC) has granted a total of 65 licenses and call signs in the category of Amateur license in Upper Marlboro, Maryland. Select a call sign from the table below to view its details such as the date of authorization, expiration date, service description, and so forth.
| Call Sign | License Holder Name | Date of Authorization |
|---|---|---|
| AC3EB | Etherton, David L | 2019-02-11 |
| KA2KPO | REMMERS, RUTH D | 2004-02-18 |
| KA3DAE | Metler Sr, James P | 2017-12-06 |
| KA3NJF | BROWN, WARREN S | 2013-08-22 |
| KA3VNI | CURTIS, LINDA L | 2020-01-30 |
| KB3BUR | CAHOON, ERIC J | 2007-06-28 |
| KB3EZQ | Otto Stewart, Jenny | 2020-08-28 |
| KB3FEB | GILLIAM JR, WILLIAM A | 2010-03-24 |
| KB3FNW | HAMILTON JR, DAVID W | 2020-09-22 |
| KB3IIE | GREENHOUSE, KENNETH F | 2012-04-12 |
| KB3IRJ | Peed, Aaron R | 2012-07-31 |
| KB3JRR | Puffett, Cory J | 2013-04-02 |
| | ||
| KB3JRS | Puffett, Louisa L | 2013-04-02 |
| KB3KWA | MARTIN, ANTHONY K | 2013-12-23 |
| KB3LNV | Kelso, Craig F | 2015-05-21 |
| KB3NDP | Wood, Victoria L | 2006-02-13 |
| KB3NOL | CARR, REYNOLD C | 2016-02-23 |
| KB3PEX | HAWKINS, CALVIN S | 2017-10-06 |
| KB3POQ | Scholze, Gary M | 2017-06-16 |
| KB3PRB | Brown, Gerda E | 2017-08-15 |
| KB3QGJ | McCloud, Thomas H | 2017-11-13 |
| KB3RKF | Baker, Doyle J | 2008-06-25 |
| KB3TRB | Hernandez, Juan M | 2009-11-23 |
| KB3VWG | LEACH II, LYNWOOD W | 2021-01-07 |
| KB3YFO | Baughman, Allen B | 2012-03-12 |
| KB3YLX | GLOVER, LANCE V | 2022-03-03 |
| KC3AFD | Tillman II, Anthony R | 2023-03-21 |
| KC3BBV | Purvis, Keith S | 2013-08-12 |
| KC3CHS | Parson, George K | 2014-03-18 |
| KC3DDC | Warren, Robert L | 2014-06-26 |
| KC3EDA | HEY, CLEMENT W | 2015-01-12 |
| KC3EPZ | Braswell, Robert M | 2015-03-25 |
| KC3FWE | Smith, Janine | 2015-11-04 |
| KC3GQP | Albert, Frank C | 2016-03-07 |
| KC3GRY | Hunter I, Jeffrey B | 2016-03-11 |
| KC3KHH | Rorick, James T | 2017-11-20 |
| KC3LFB | Gest IV, Robert | 2018-04-16 |
| KC3PMO | Thomas Jr, Cleophus | 2020-06-25 |
| KC3SBR | Motroni, Stephen | 2021-05-11 |
| KD3EL | BAKER, EDWARD F | 2017-09-27 |
| KE5ZXB | Renfro, Steven E | 2019-02-27 |
| KG4CEJ | BRAY, BRIAN J | 2019-11-22 |
| KI4DXR | Powell, Caitlyn J | 2014-05-31 |
| KM6HFR | Wheeler, Mark S | 2016-12-19 |
| KR3F | BELL JR, THOMAS | 2020-09-15 |
| N3CEA | MELOY, RALPH E | 2016-01-06 |
| N3CHS | GURSKEY, JACK A | 2014-12-08 |
| N3CPK | MARSHALL, RONALD L | 2021-01-29 |
| N3CRW | BECKER, HENRY | 2017-01-12 |
| N3HIZ | KRAKOSKY SR, MICHAEL F | 2009-05-02 |
| N3KC | HICKS, JESSE C | 2019-03-05 |
| N3KNR | Elam, Roderick D | 2021-08-10 |
| N3LGB | STEWART JR, WILLIS S | 2011-11-17 |
| N3RGK | KRAKOSKY JR, MIKE F | 2004-01-01 |
| N3RGL | SPICER JR, BERNARD D | 2013-10-22 |
| N3SLK | Priebe, STEVEN F | 2014-08-28 |
| N3ZWC | BIGGS, BRENDA J | 2007-08-21 |
| W3BFL | SEARS JR, THOMAS A | 2016-02-03 |
| W4PFB | Bradley, David A | 2008-02-04 |
| WA3YTK | Snider Jr, Richard H | 2018-05-12 |
| WB3FIL | BOYETTE, ROBERT L | 2016-06-17 |
| WB3JIK | LAWRENCE JR, JOSEPH M | 2017-12-06 |
| WB3JIR | BROWN, EUGENE S | 2005-04-05 |
| WB3LBL | FAUNTLEROY, ALVIN H | 2015-10-17 |
| WD3P | CAHOON, LAWRENCE S | 2020-06-23 |
