The Federal Communications Commission (FCC) has granted a total of 312 licenses and call signs in the category of Amateur license in Frederick, 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 |
|---|---|---|
| KC3CAK | Van Dermark, Scott J | 2014-02-03 |
| KC3CHP | Rypka, Robert A | 2014-03-18 |
| KC3DAP | Pondo II, Kenneth J | 2014-06-16 |
| KC3DBU | Johnson, Holly L | 2014-06-23 |
| KC3DMA | Stanley, Christopher R | 2014-09-16 |
| KC3DMC | Henneberger, Daniel | 2014-09-16 |
| KC3DNE | Fisher, Francis R | 2014-09-22 |
| KC3DPA | Van Lehn, Sethany A | 2014-10-06 |
| KC3DWD | McAteer, Stephen R | 2014-11-14 |
| KC3DYJ | Van Lehn, Richard G | 2014-11-26 |
| KC3EHC | ANDERSON JR, JOSEPH J | 2015-02-09 |
| KC3EOJ | Nelson, Mark S | 2015-03-18 |
| | ||
| KC3EYV | Brown, Denzil | 2015-05-11 |
| KC3EZA | Brown, Kimberly | 2015-05-11 |
| KC3FAP | Gannon, Matthew T | 2015-05-18 |
| KC3FFQ | Baldwin, Mark E | 2015-07-10 |
| KC3FJR | Crawson, Sydney M | 2015-08-18 |
| KC3FML | Hafner, Joseph | 2015-09-14 |
| KC3FZV | Wittkamper, John A | 2015-11-23 |
| KC3GAK | Bolin, Glen A | 2015-11-25 |
| KC3GRE | Kennedy, Justin | 2016-03-07 |
| KC3GTW | MARTIN, DANIEL | 2016-03-17 |
| KC3HPE | McAdam, Kathleen E | 2016-08-19 |
| KC3HPF | Rypka, Kathryn E | 2016-08-23 |
| KC3IKH | Kuhn, Craig S | 2017-01-19 |
| KC3ILV | Norman, Alex B | 2017-01-25 |
| KC3IMM | Ordonio, David R | 2017-01-31 |
| KC3JFQ | Isoldi, Daniel H | 2017-05-15 |
| KC3JFS | Ordonio, Denise S | 2017-05-15 |
| KC3JHI | Stone, Christopher I | 2017-05-30 |
| KC3JUX | Meech, James D | 2017-09-19 |
| KC3JUZ | Berzinski, Richard J | 2017-09-19 |
| KC3JWK | Vendemia, Martin | 2017-09-27 |
| KC3JZB | Stapleton, Curtis | 2017-10-16 |
| KC3KHC | Kirk, Christopher J | 2017-11-20 |
| KC3KJL | GRENFELL, PETER W | 2017-12-01 |
| KC3KOH | DURNAL, AIDAN J | 2018-01-08 |
| KC3KRA | Wagner Jr, Garry C | 2018-01-26 |
| KC3KSL | BOND JR, EDWIN L | 2018-02-05 |
| KC3KWL | Ranneberger, Cynthia M | 2018-02-26 |
| KC3LCC | MAWDSLEY, JAMES P | 2018-03-29 |
| KC3LLG | Babcock, Lee H | 2018-05-15 |
| KC3LQR | Minaert, John | 2018-06-18 |
| KC3LRS | CARDINALE, DALLAS | 2018-06-25 |
| KC3LTT | Goebel, Daniel C | 2018-07-09 |
| KC3LWB | HOLMES, TROY EDWARD | 2018-07-23 |
| KC3MOG | Wilson, William G | 2018-12-10 |
| KC3MRC | Francis Scott Key Amateur Radio Club | 2018-12-28 |
| KC3NAZ | Rixham, John R | 2019-03-14 |
| KC3NBR | Schultz, Stephen J | 2019-03-18 |
| KC3NFR | Ritterbusch, Anna L | 2019-04-03 |
| KC3NJR | Vance, William D | 2019-04-29 |
| KC3NOW | COCHRAN, SETH A | 2019-06-03 |
| KC3NVC | Kelly, Timothy J | 2019-07-23 |
| KC3NXF | WALKER, EVELYN A | 2019-07-19 |
| KC3OIX | Gemeny, Andrew G | 2019-11-12 |
| KC3PBB | Acchiardo, Christopher G | 2020-03-09 |
| KC3PKP | Prassinos, Nikolas G | 2020-06-18 |
| KC3PPS | Vale, Nikolas G | 2020-07-13 |
| KC3PRI | Czeh, Philip A | 2020-07-21 |
| KC3PRL | Bucheimer III, John M | 2020-07-21 |
| KC3PST | Masser, David C | 2020-07-28 |
| KC3PWQ | Suarez Jr, Victor A | 2020-08-24 |
| KC3QAC | Manson, Thomas J | 2020-09-14 |
| KC3QIE | Pasupuleti, Sesha Charan | 2020-10-23 |
| KC3QXL | Moore Jr, Donald | 2021-01-05 |
| KC3RAI | Gardner, Cubby | 2021-01-25 |
| KC3RKA | Hart, Mark A | 2021-03-01 |
| KC3RRB | Vann IV, Livingston | 2021-03-25 |
| KC3S | CREEKMORE, STEPHEN P | 2018-04-06 |
| KC3SAG | TIMPANE, LIAM | 2021-05-03 |
| KC3SGB | Shafer, Ethan D | 2021-06-02 |
| KC3SIE | Fallow, Donna L | 2021-06-22 |
| KC3SNV | Barbeito, Ron M | 2021-08-05 |
| KC3TEE | Rohloff, Michael E | 2021-11-29 |
| KC3TPU | Tievy, Bryan E | 2022-03-02 |
| KC3TQL | Brazil, Joshua C | 2022-03-08 |
| KC3TRA | Hawkins, Justin J | 2022-03-11 |
| KC3TUC | Brunner, Christopher W | 2022-03-22 |
| KC3UEU | Calloway, Roderick A | 2022-05-17 |
| KC3UHZ | Iyamu, Ophel A | 2022-06-03 |
| KC3UQL | O'Toole, Brian P | 2022-08-12 |
| KC3UUB | Stewart Jr, Charles A | 2022-09-13 |
| KC3UUN | Risk, William B | 2022-09-16 |
| KC3UUR | Olsen, Peter C | 2022-09-17 |
| KC3UUY | Linberg, Steven C | 2022-09-20 |
| KC3UXN | Dmuchowski, Jacob | 2022-10-12 |
| KC3VGO | Skipper IV, Nathan R | 2022-12-06 |
| KC3VNA | Kachursky, Nancy M | 2023-02-07 |
| KC3VNN | Vaughn, Shaun | 2023-02-07 |
| KC3VPH | Doornink, Reuben G | 2023-02-22 |
| KC3VPT | Karstens, Gary E | 2023-02-22 |
| KC3VPU | Wright, Matthew | 2023-02-22 |
| KC3VQZ | Jayatilleke Sr, S Mahabalage Don D | 2023-03-07 |
| KC3VRT | Kan, Sunghwan D | 2023-03-10 |
| KC3VVT | Reber, Sue | 2023-04-04 |
| KC8HHP | ARNOLD, CURTIS H | 2008-02-02 |
| KC8NIL | Wolfer, Nickilos J | 2019-10-08 |
| KC8RZM | Palmer, John R | 2021-07-09 |
| KC8SKO | WOLFER, Kathleen A | 2021-09-01 |
