The Federal Communications Commission (FCC) has granted a total of 161 licenses and call signs in the category of Amateur license in O Fallon, Missouri. 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 |
|---|---|---|
| AA9KO | STAMM, JOSEPH H | 2004-02-26 |
| AC0ME | Mahadev, C R | 2018-05-01 |
| AD0MO | REGAN, JOHN D | 2015-02-11 |
| AD0PJ | Schubert, George J | 2022-11-01 |
| AD0YL | Orf, Paul E | 2017-01-09 |
| AD0ZQ | Hall, Mark E | 2017-11-01 |
| AE0CO | MITCHELL, TIMOTHY J | 2019-05-09 |
| AE0FI | Loewe, Charles | 2019-03-07 |
| AE0HE | Clayton, Charles L | 2019-07-24 |
| K0CQE | SOWDERS, JOE H | 2018-06-08 |
| KA0CNI | MITCHELL, TIMOTHY J | 2009-03-19 |
| KA0FQY | SCHIDE, CATHERINE E | 2017-01-24 |
| | ||
| KA0GLG | MC GUIRE, JAMES H | 2015-12-17 |
| KA0VET | CORVEY, JAMES F | 2011-03-29 |
| KA0VWC | EICHENSER, GREGORY J | 2020-09-02 |
| KB0HTQ | ANDERSON, KEITH A | 2014-04-08 |
| KB0IAN | Will, Richard C | 2013-03-05 |
| KB0ORF | MITCHELL, CYNTHIA C | 2015-07-24 |
| KB0TVO | SCHLEF, FRED L | 2015-06-05 |
| KB0YPE | WALL, MICHAEL J | 2006-07-10 |
| KB4GNM | DROUIN, DOUGLAS R | 2008-08-19 |
| KB8QBA | GUINN, MICHAEL R | 2015-01-27 |
| KC0DDJ | DELO, HALDON B | 2017-12-29 |
| KC0PFB | West Jr, Tod A | 2012-12-03 |
| KC0RIU | Guinn, Michael L | 2003-12-19 |
| KC0UEK | MORGAN, THOMAS A | 2005-03-28 |
| KC0UHM | Cordes, Terence M | 2016-10-21 |
| KC0UYI | Kelley, Michael L | 2005-08-10 |
| KC0VIL | Keeler, Carrie L | 2005-10-28 |
| KC0YAR | Pikey, Patricia E | 2016-06-16 |
| KC0ZGN | Jaeger, Arnold S | 2007-01-12 |
| KC8PYZ | Cordell, Kevin G | 2020-10-31 |
| KC9UAT | Hamilton, Michael W | 2021-03-10 |
| KD0ABD | LIESMANN, KRISTOPHER P | 2017-01-18 |
| KD0ABE | LIESMANN, AMY L | 2017-01-18 |
| KD0ABF | LIESMANN, TYLER P | 2017-01-18 |
| KD0AXH | Jenkins, Kenneth E | 2007-06-13 |
| KD0AZL | Jones II, Robert P | 2017-04-18 |
| KD0BIS | Callihan, John P | 2007-08-14 |
| KD0CVE | Smith, Randy K | 2017-11-17 |
| KD0EN | SCHIDE, HOWARD S | 2017-01-24 |
| KD0EOU | Stortz, Denny D | 2008-07-10 |
| KD0JIX | Murray, Kelly D | 2020-01-08 |
| KD0LAN | Cutter, Virgil E | 2010-04-09 |
| KD0LUA | David, Marcia A | 2010-05-24 |
| KD0MHK | Batzer, William | 2010-07-01 |
| KD0MPI | Cassidy, Jeffrey A | 2010-08-23 |
| KD0MRF | Zinselmeyer, Bentley A | 2020-07-21 |
| KD0MRG | Zinselmeyer, Macklin C | 2020-07-21 |
| KD0MRH | Zinselmeyer, Andrea M | 2020-07-21 |
| KD0NFN | Molitor, Matthew J | 2010-12-08 |
| KD0OCS | Heard, Michael F | 2021-03-09 |
| KD0OQW | Costello, Mike J | 2011-05-18 |
| KD0OZE | Hicks, Tina E | 2021-04-27 |
| KD0QDB | Tilley, Ryan P | 2011-11-22 |
| KD0RAW | Bartz, Christopher Y | 2012-03-01 |
| KD0RFC | Gutierrez, Jose E | 2012-03-12 |
| KD0RNZ | Atherton III, Paul W | 2022-03-30 |
| KD0RRU | Droegkamp, Mark A | 2012-04-25 |
| KD0TEY | Eddy, Roger K | 2012-09-28 |
| KD0TMI | LOUGHRIDGE III, LUTHER D | 2012-10-26 |
| KD0UZV | Evans, Alphonse V | 2023-04-04 |
| KD0WTN | Davis, Mical G | 2013-10-17 |
| KD0WTO | Rosick, James A | 2013-10-17 |
| KD0YZH | Herr, Michael E | 2014-02-03 |
| KD0ZNB | Grimsbo, Josh P | 2014-03-12 |
| KE0ARX | Hogan Jr, Veigh E | 2014-05-30 |
| KE0ARY | Gremard, John D | 2014-05-30 |
| KE0ASQ | Lestina, Ryan M | 2014-06-03 |
| KE0BAU | Sofka, Judith P | 2014-06-26 |
| KE0BAV | Wienski, Kenneth | 2014-06-26 |
| KE0BAZ | Wienski, Charlotte D | 2014-06-26 |
| KE0BER | Reeves, Jimmy D | 2014-07-07 |
| KE0CJH | Lu, Zheng | 2014-11-26 |
| KE0CJK | Hollenbeck, Kenneth L | 2014-11-26 |
| KE0FAP | Rouse, Michael W | 2015-06-25 |
| KE0FRL | Bargielski III, John S | 2015-09-10 |
| KE0FYT | Clark, Jason A | 2015-10-07 |
| KE0GUH | Horner, Robert G | 2015-11-25 |
| KE0GUJ | Rickerson, Bradley M | 2015-11-25 |
| KE0GUL | Hamann, Ricky J | 2015-11-25 |
| KE0HKL | Slatton Jr, Alvin B | 2016-02-09 |
| KE0HKO | Carey, Steven P | 2016-02-09 |
| KE0HVB | Ham, James D | 2016-03-01 |
| KE0HXJ | Hays Jr, John D | 2016-03-03 |
| KE0HXL | Grogan, Justin S | 2016-03-03 |
| KE0IMI | Furniss, Richard D | 2016-04-05 |
| KE0JIJ | Ketsenburg Jr, Alfred B | 2016-05-25 |
| KE0JLN | McCann, Robert J | 2016-06-01 |
| KE0JTX | Armstrong, William L | 2016-07-13 |
| KE0JUM | Lehmuth, Clayton E | 2016-07-13 |
| KE0LDV | Harston, Tania L | 2016-11-29 |
| KE0LOY | Orf, Paul E | 2017-01-09 |
| KE0MTQ | Holdinghausen, Eugene E | 2017-04-03 |
| KE0NMR | DiCicco, Mark E | 2017-05-26 |
| KE0NNA | Worzel, Nathanael G | 2017-05-26 |
| KE0NWI | Russell, Joel R | 2017-07-10 |
| KE0NWJ | Smith, Randal S | 2017-07-10 |
| KE0OCN | Geders, Matthew P | 2017-08-02 |
| KE0OVY | Burnett, Derek L | 2017-11-01 |
