The Federal Communications Commission (FCC) has granted a total of 212 licenses and call signs in the category of Amateur license in Altadena, 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 |
|---|---|---|
| KJ6MCW | Morgan, Steven J | 2020-11-19 |
| KJ6NJT | Revati, Revvell P | 2011-03-22 |
| KJ6NTR | Buangsuwon, Panupong | 2021-02-25 |
| KJ6QWQ | McLennan, Donald A | 2021-07-15 |
| KJ6QZR | Collins, David W | 2011-09-01 |
| KJ6RYD | Stein, Lori A | 2021-09-14 |
| KJ6SCU | Thompson, Michael D | 2011-10-21 |
| KJ6SCX | Gold, Seth M | 2021-07-24 |
| KJ6WKS | Cotton-Munn, Naomi J | 2012-05-07 |
| KJ6YIC | Pedzoza, Carl J | 2012-06-11 |
| KJ6YIF | Darling Jr, Fred R | 2022-04-19 |
| KJ6ZHJ | Cesario, Vincent F | 2012-08-15 |
| | ||
| KK6AGH | Thompson De Benoit, Alexine | 2012-10-19 |
| KK6BIE | Prinsloo, Anthonius | 2012-12-12 |
| KK6BOK | Stram, Alexander H | 2023-01-04 |
| KK6EUH | Keaton Jr, Roderick W | 2023-04-20 |
| KK6HVR | Christ, Joan C | 2013-11-19 |
| KK6KOH | Mader, Mark O | 2014-03-17 |
| KK6MYQ | Slythe, Carlos | 2014-06-06 |
| KK6PQZ | Miller, Joshua A | 2014-10-29 |
| KK6PUF | Brandeau, Erich J | 2014-11-05 |
| KK6RAV | Hersey, Jay L | 2014-12-19 |
| KK6RID | Gray, Brian D | 2015-01-15 |
| KK6SDE | Van Valkenburg, Barry | 2015-02-19 |
| KK6SDG | White, Victor | 2015-02-19 |
| KK6SUR | Roper, Matthew M | 2015-03-23 |
| KK6THW | Scislowicz, Caz | 2015-04-16 |
| KK6TIX | Potter, Emily | 2015-04-20 |
| KK6TIY | Potter, Hannah | 2015-04-20 |
| KK6TIZ | Potter, Susan K | 2015-04-20 |
| KK6TJB | Long, Michael J | 2015-04-20 |
| KK6TJT | Potter, Timothy J | 2015-04-20 |
| KK6TKH | Hurd, Eric A | 2015-04-21 |
| KK6YVS | VanderVelda, Eric T | 2015-11-23 |
| KM6AHX | Kline, Adam A | 2016-02-09 |
| KM6EMO | Luna, John C | 2016-08-05 |
| KM6ERL | Hope, Margery J | 2016-08-18 |
| KM6GHV | Maljian, Jacob H | 2016-11-07 |
| KM6HNL | Paris, Dorai B | 2017-01-18 |
| KM6IDF | Subsomboon, Staporn Kema | 2017-02-06 |
| KM6IIX | Leichty, John M | 2017-02-16 |
| KM6JMP | Huidor, Sergio | 2017-03-22 |
| KM6KAQ | Newman, Michael B | 2017-04-24 |
| KM6KVL | Morgan, Zachary T | 2017-06-02 |
| KM6MDU | Pozhitkov, Alexander | 2017-08-10 |
| KM6MNC | Andrews, Bruce D | 2017-09-01 |
| KM6NJE | Calabia, Florence Neal | 2017-10-24 |
| KM6NYJ | Berry, Timothy A | 2017-11-07 |
| KM6OUI | Arroyo, Phillip M | 2017-12-01 |
| KM6PEY | De La Torre, James E | 2017-12-19 |
| KM6PFE | LeConte, Jean-Baptiste | 2017-12-20 |
| KM6QGK | Yim, Victoria | 2018-02-14 |
| KM6QNS | Ross, Tannisha K | 2018-02-21 |
| KM6QZA | Cotton-Munn, Naomi J | 2012-05-07 |
| KM6RHW | Cotton-Munn, Naomi | 2012-05-07 |
| KM6RPO | Cotton-Munn, Naomi | 2012-05-07 |
| KM6SPH | Cotton-Munn, Naomi | 2012-05-07 |
| KM6TGJ | Cain, James P | 2018-05-22 |
| KM6TKJ | Pollard, John V | 2018-05-23 |
| KM6TNV | Mitchell, Philip F | 2018-05-30 |
| KM6UHU | Nowak, Derek | 2018-06-29 |
| KM6UHX | Walker, Paula K | 2018-06-29 |
| KM6WJR | DeMario, Benjamin E | 2018-10-19 |
| KM6WZN | Wessel, David M | 2018-11-19 |
| KM6ZSE | Rutt, Timothy J | 2019-02-14 |
| KN6AHZ | Muller, Henry R | 2019-03-07 |
| KN6BKN | Kirby, Martin R | 2019-04-23 |
| KN6BSN | Vajk, Stephen D | 2019-05-06 |
| KN6DSF | Burgos, Mario | 2019-08-12 |
| KN6DVC | De La Croix, Jean-Pierre | 2019-08-19 |
| KN6EJG | Linam, Justin C | 2019-09-20 |
| KN6EJH | Langholz, Bryan M | 2019-09-20 |
| KN6FYP | Stiles, Adam | 2019-11-25 |
| KN6HQF | Ferreira, Alexander J | 2020-02-18 |
| KN6HQJ | Raff, William | 2020-02-18 |
| KN6JVH | STANKO, ALLISON | 2020-07-13 |
| KN6KJO | Groh, Brian W | 2020-08-18 |
| KN6KRQ | Lerew, Jennifer | 2020-09-08 |
| KN6MDM | Chylek, Tomas | 2020-11-16 |
| KN6NKR | Lamar-Bruno, Kathryn E | 2021-02-16 |
| KN6PEJ | Hainer, Jonathan R | 2021-06-07 |
| KN6SLA | Nowlin, Anne | 2022-01-18 |
| KN6SLG | House, Martha A | 2022-01-18 |
| KN6SPR | Bermudez, Alexander | 2022-02-03 |
| KN6SZG | Daghlian, Saren H | 2022-02-28 |
| KN6TUE | Wang, Wen P | 2022-04-18 |
| KN6ULP | Jaques, Darrin | 2022-06-01 |
| KN6WCQ | PETERS, DAVID | 2022-10-13 |
| KN6WQA | Baker, Timothy A | 2022-11-22 |
| KN6YQC | Goodwell, Richard C | 2023-02-24 |
| KN6ZEY | Zayas, Daniel | 2023-04-04 |
| KN6ZHQ | Blakely, Nathaniel | 2023-04-11 |
| N5DPU | Deen, Robert G | 2014-01-10 |
| N6IOC | JOHNSON, DONALD L | 2016-12-14 |
| N6UMT | OHNUKI, TOHRU | 2019-01-01 |
| N6VYF | LAKELAND, DAN L | 2019-02-01 |
| W6LSH | SLONSKI JR, JOHN P | 2018-05-30 |
| W6MPH | TELCO AMATEUR RADIO CLUB | 2022-08-06 |
| WA6LDT | BELL, ROBERT B | 2014-12-05 |
| WA6TFD | GLISPIE, BRYAN K | 2017-03-06 |
