The Federal Communications Commission (FCC) has granted a total of 49 licenses and call signs in the category of Amateur license in Piedmont, 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 |
|---|---|---|
| AJ6AZ | Bransfield III, Joseph P | 2013-01-16 |
| KA6GEM | Bailey Gates, Paul C | 2016-12-09 |
| KD7NR | BAZ, NICHOLAS D | 2018-03-07 |
| KE6EHF | GON, MARTIN K | 2014-06-05 |
| KE6NHD | ANDERSON, DANIEL F | 2004-11-22 |
| KE6VSM | HADLEY, HERBERT S | 2005-06-07 |
| KF6FRC | FORSYTHE, WILLIAM R | 2006-08-10 |
| KF6GYN | PAULDING, GEORGE B | 2016-09-16 |
| KG6BDP | Moore, George M | 2020-06-25 |
| KG6QJD | Barber, Ryan | 2013-04-23 |
| KI6AHT | ANDREAS, GREGORY B | 2005-08-08 |
| KI6AWS | HERRICK, MARK E | 2015-08-13 |
| KI6DG | BARINGER, WILLIAM B | 2016-02-18 |
| KI6DVI | MACLEAN JR, JAMES H | 2006-05-09 |
| KI6DVQ | TESSANDORI, JOHN K | 2006-05-09 |
| KI6ERX | Boltwood, Evan P | 2006-07-17 |
| KI6TCY | BLEICH, MATTHEW M | 2008-09-11 |
| KJ6BIN | Ball, Angela M | 2009-07-30 |
| KJ6JGS | Levy, Alfio | 2010-06-25 |
| KJ6NGM | Jones, Jeffrey R | 2021-01-26 |
| KJ6NHB | Hauser, Gregg A | 2021-03-09 |
| KK6BQB | Bransfield III, Joseph P | 2013-01-16 |
| KK6CGG | Lee, Isaac C | 2013-02-05 |
| KK6DQL | Farrand, Rachel R | 2013-04-18 |
| KK6IWN | Berl, Steven H | 2014-01-22 |
| KK6LGZ | Oesterer, Andreas U | 2014-04-14 |
| KM6AOO | GUIDI, MATTHEW F | 2016-02-19 |
| KM6FOT | PAULDING, GEORGE B | 2016-09-16 |
| KM6GHD | Guan, Darion | 2016-11-07 |
| KM6OCB | Robinson, Arthur D | 2017-11-07 |
| KM6UAM | Muhiudeen, Kamil J | 2018-06-15 |
| KM6WOJ | Rhodin, Jon H | 2018-10-30 |
| KM6WON | Rhodin, Maureen O | 2018-10-30 |
| KM6YCY | Hann, Jay | 2018-11-26 |
| KM6ZNR | Jerez, Javier | 2019-02-06 |
| KN6DPQ | Shields, Connick N | 2019-08-06 |
| KN6IVX | Knisbacher, Eli | 2020-05-18 |
| KN6JZZ | BODNAR, GUILLERMO | 2020-07-23 |
| KN6LJU | Phua, Bill | 2020-10-14 |
| KN6MWF | Menscher, Damian P | 2021-01-11 |
| KN6OKU | Whitted, Blair N | 2021-04-12 |
| KN6UQW | Fischer, Barry | 2022-06-14 |
| KN6WSB | Davidson, Erick M | 2022-11-29 |
| KN6ZMZ | Lambert, John H | 2023-04-27 |
| N4YRJ | ST WECKER, PETER G | 2021-01-26 |
| N6IFE | HADLEY, PAMELA STARR | 2009-04-21 |
| W6IDM | ROCCHIO, JACK W | 2014-10-03 |
| W6RNM | LEZOTTE, JOHN M | 2014-10-29 |
| WD6EGB | ARACIC, NICHOLAS M | 2016-03-08 |
