The Federal Communications Commission (FCC) has granted a total of 508 licenses and call signs in the category of Amateur license in Concord, 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 |
|---|---|---|
| KJ6OFS | BISHOP, MATTHEW E | 2021-02-23 |
| KJ6OHX | Chiang, Jim C | 2021-01-28 |
| KJ6PAD | Jefferson, Kanika | 2011-05-23 |
| KJ6PAS | Thomas, Michele L | 2011-05-23 |
| KJ6PBE | Josephs, Susan M | 2021-03-01 |
| KJ6PCH | Beck, Clifford N | 2021-07-22 |
| KJ6PCR | Fitt, Jon C | 2021-06-29 |
| KJ6QGQ | Miracle, Charles E | 2011-07-22 |
| KJ6QZD | Riggs, Joseph W | 2011-08-31 |
| KJ6RQS | O'Brien, Sean K | 2011-10-06 |
| KJ6RRJ | Holst, Timothy M | 2011-10-06 |
| KJ6RRW | Cary, Craig A | 2021-08-26 |
| | ||
| KJ6RWU | Hartnett, Thomas T | 2011-10-12 |
| KJ6RWV | Shepherd, Mark C | 2011-10-12 |
| KJ6RWY | Hotopp, Vikki K | 2021-08-20 |
| KJ6RWZ | Nelson Jr, Fred H | 2011-10-12 |
| KJ6RXD | Skinner, James M | 2021-07-20 |
| KJ6UCX | Matlakiewicz, Arthur S | 2012-02-14 |
| KJ6ULD | Cohune, Darrin P | 2012-02-22 |
| KJ6ULS | Sylvester, Rudolph J | 2012-02-22 |
| KJ6USQ | Root, Daniel E | 2012-03-08 |
| KJ6USS | Erlick, Steven A | 2022-01-31 |
| KJ6UST | Jones, Justin E | 2012-03-08 |
| KJ6USX | Faires, Steven R | 2012-03-08 |
| KJ6UTB | Hanks, Gary T | 2012-03-08 |
| KJ6UTD | Lowder, Torrey R | 2012-03-08 |
| KJ6UTE | Lopez, Rudy G | 2012-03-08 |
| KJ6UTF | Hadley, David S | 2012-03-08 |
| KJ6UTP | Hanks, Cynthia B | 2012-03-08 |
| KJ6UTQ | Mortensen, Ron K | 2012-03-08 |
| KJ6UTR | Sooter, Sean K | 2012-03-08 |
| KJ6UTU | Caro, Cameron T | 2012-03-08 |
| KJ6UTV | Perona, Devan R | 2012-03-08 |
| KJ6UTX | Frost, Sandra L | 2012-03-08 |
| KJ6UUB | Torres, Eddy A | 2012-03-08 |
| KJ6UUH | Blankenship, Chuck | 2012-03-08 |
| KJ6UUJ | Walley, Bryan J | 2012-03-08 |
| KJ6VZJ | Leal, Barbara I | 2012-04-27 |
| KJ6VZM | Martin, Scott C | 2022-03-22 |
| KJ6VZS | Parkin, Kenneth B | 2012-04-27 |
| KJ6WLJ | Martin, Carl S | 2022-02-16 |
| KJ6YAD | Ripley, Robert C | 2022-03-12 |
| KJ6YAE | Smith, Cherene M | 2012-06-01 |
| KJ6YNO | Walton, Catherine J | 2012-06-28 |
| KJ6ZJE | Carvajal, Carlos J | 2012-08-21 |
| KJ6ZJR | Halim, Leo | 2012-08-21 |
| KJ6ZYY | Contreras, Leslie A | 2012-10-10 |
| KJ6ZYZ | Coffer, Andrew W | 2012-10-10 |
| KK6ADA | Ho, Connie P | 2012-10-18 |
| KK6AED | Wilhelm, Reid F | 2012-10-18 |
| KK6ARZ | Howard, Mark A | 2012-11-06 |
| KK6AUH | Beasley, Geoffrey A | 2012-11-07 |
| KK6BXQ | Hamilton, James R | 2013-01-29 |
| KK6BXR | Schutz, Steven J | 2022-11-08 |
| KK6CIR | Taggart, Anna M | 2013-02-11 |
| KK6CQU | Shields, Sherry L | 2013-02-28 |
| KK6DBS | Refour, Roberta L | 2013-03-22 |
| KK6DBY | Goglia, Patricia | 2022-12-24 |
| KK6DCB | Gaya, Fay P | 2013-03-22 |
| KK6DCC | Gaya, Jerry L | 2013-03-22 |
| KK6DCD | Limberg, Albert F | 2023-03-29 |
| KK6DCG | Carty, Leonard M | 2013-03-22 |
| KK6DCH | Wadsworth, Ben R | 2013-03-22 |
| KK6EJO | Li, Yarxue | 2013-05-14 |
| KK6FAV | Miller, Nancy H | 2013-06-14 |
| KK6FAW | Boone, Dustin | 2013-06-14 |
| KK6FZH | Clugston, Jamie L | 2013-08-02 |
| KK6GSA | Sobolev, Sergey | 2013-09-25 |
| KK6GXX | Green, Richard A | 2013-10-17 |
| KK6GXY | Smith, Nancy L | 2013-10-17 |
| KK6GXZ | Dubey, Laura J | 2013-10-17 |
| KK6GYE | Chiok, Kevin C | 2013-10-17 |
| KK6GYH | Lodin, Ingrid E | 2013-10-17 |
| KK6HOW | Guenther, Andreas | 2013-11-05 |
| KK6IDC | Polifrone, Mircea M | 2013-11-26 |
| KK6IDL | Adams, Rebekah | 2013-11-26 |
| KK6JFL | Fanucchi, Christopher | 2014-01-31 |
| KK6KGN | Pimentel Wheeler, Mary L | 2014-03-06 |
| KK6KGR | Mallett, Joe F | 2014-03-06 |
| KK6KGT | Pimentel Wheeler, Ben C | 2014-03-06 |
| KK6KGU | Trujillo, Richard | 2014-03-06 |
| KK6KGW | Wells, Kathleen D | 2014-03-06 |
| KK6LHI | Brown, Dennis S | 2014-04-14 |
| KK6LPE | Baughman, Jeffrey H | 2014-04-24 |
| KK6LQW | Hundley, Lucas A | 2014-04-25 |
| KK6LRQ | Roberts, Janice F | 2014-04-29 |
| KK6LSJ | Boggs, Matthew W | 2014-04-29 |
| KK6LST | Walter, David K | 2014-04-30 |
| KK6LTJ | CHAPLIN, SHYLA M | 2014-04-30 |
| KK6LVR | TALOSIG, PAUL ANTHONY M | 2014-04-30 |
| KK6MUO | Maniti, Lucille | 2014-05-30 |
| KK6MVS | McHuron, Christopher R | 2014-06-03 |
| KK6NOB | Mallett, George K | 2014-06-24 |
| KK6NOC | Kates, William A | 2014-06-24 |
| KK6OLD | Miller, Marsha A | 2014-08-14 |
| KK6QAH | Riels, Christopher A | 2014-11-12 |
| KK6QPE | Bradley, Larry H | 2014-12-01 |
| KK6RXZ | Custodio, Rommel G | 2015-02-13 |
| KK6SBG | Branda, Roy D | 2015-02-18 |
| KK6SKQ | Lynd, Scott A | 2015-03-09 |
