The Federal Communications Commission (FCC) has granted a total of 37 licenses and call signs in the category of Restricted Operator license in Castro Valley, California. 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 |
|---|---|---|
| RL00002077 | Hamid, Jahan Z | 2005-03-23 |
| RR00004672 | BALSER, JASON S | 2002-02-23 |
| RR00012973 | AZEVEDO, CLAUDIO E | 2003-06-28 |
| RR00014682 | KNUDSEN, JAY A | 2003-10-29 |
| RR00036330 | Ingram, Gareth A | 2006-04-07 |
| RR00038593 | danbrova, duane d | 2006-07-13 |
| RR00044269 | HINISH, LONNIE O | 2007-01-27 |
| RR00050594 | Simons, Nicholas R | 2007-07-28 |
| RR00057041 | Taylor Jr, Larry J | 2008-02-27 |
| RR00059243 | Couche, John K | 2008-05-15 |
| RR00063243 | Porta, Anthony J | 2008-12-30 |
| RR00066003 | Ku, Dennis Gem Sen | 2009-06-23 |
| RR00069563 | Barnes, Danny R | 2010-02-11 |
| RR00073701 | Cederstrom, Jared L | 2010-09-21 |
| RR00082028 | LAWLEY III, FREDERICK E | 1983-06-03 |
| RR00085113 | RENZI Mr., SANDRO | 2012-03-03 |
| RR00092961 | Crocker III, Frederick G | 2013-02-23 |
| RR00099043 | Chan, Ying Ming | 2013-12-14 |
| RR00106413 | Tracq, Daniel A | 2014-09-20 |
| RR00115215 | Fukutake, Ikko | 2015-09-29 |
| RR00119867 | Sill, Matthew S | 2016-03-19 |
| RR00120985 | Berge, Christian F | 2016-04-28 |
| RR00122355 | Lowry, Mark E | 2016-06-15 |
| RR00123388 | Jewell, Eric | 2016-07-23 |
| RR00129205 | Smith, Derek B | 2017-02-17 |
| RR00136524 | Reince, Tyler A | 2017-10-11 |
| RR00137755 | Bishop, Jonathan M | 2017-11-16 |
| RR00140985 | Cooper, Jeffrey M | 2018-02-24 |
| RR00144149 | Laue, Eric O | 2018-05-22 |
| RR00145225 | Cardoza, Colleen T | 2018-06-23 |
| RR00158510 | Ooley, Joshua R | 2019-07-12 |
| RR00163417 | Spracklen, Jay A | 2019-11-28 |
| RR00165495 | Crosby, James H | 2020-01-28 |
| RR00170148 | Heide, Torstein | 2020-09-19 |
| RR00172019 | Aragon Hopkins, Alexandria E | 2021-01-21 |
| RR00174527 | Gavin, Andrew M | 2021-04-20 |
| RR00199925 | Conyers, HJ | 2022-12-01 |
