
| Call | Name | City | State | Class | Old Call | Effective Date | Expiration Date | Status |
|---|---|---|---|---|---|---|---|---|
| AA9PW | TWIGGER, SIMON N | Boulder | CO | E | KB9JOV | 12/22/2015 | 12/22/2025 | Active |
| AB0W | Ogren, John A | Boulder | CO | E | AD0IG | 05/20/2014 | 05/20/2024 | Cancelled |
| AC0F | YOUNG SR, ARTHUR H | BOULDER | CO | E | 09/23/2008 | 09/29/2018 | Cancelled | |
| AC0LK | Clason, Steven H | Boulder | CO | E | KD0DOZ | 02/15/2018 | 04/07/2028 | Active |
| AD0IG | Ogren, John A | Boulder | CO | E | KD0ZZY | 04/14/2014 | 04/14/2024 | Cancelled |
| AD0LC | Chadha, Rohan | Boulder | CO | E | 11/06/2014 | 11/06/2024 | Active | |
| AD0MB | Kulkarni, Vineet S | Boulder | CO | E | 12/17/2014 | 12/17/2024 | Active | |
| AD0MD | Murugesan, Manigandaraja | Boulder | CO | E | 12/17/2014 | 12/17/2024 | Active | |
| K0ETN | WOODSOME III, FREDERIC O | BOULDER | CO | G | 04/22/2008 | 04/22/2018 | Expired | |
| K0WKN | Fisher, Ronald M | Boulder | CO | G | 02/14/2006 | 05/09/2016 | Expired | |
| K2BQC | Scharf, Bennett J | Boulder | CO | G | KD0WKL | 10/17/2013 | 10/17/2023 | Active |
| K2LJK | Kurtz, Lawson T | Boulder | CO | T | KE0WZK | 11/15/2019 | 11/15/2029 | Active |
| K4DWB | Andrus, Donald W | Boulder | CO | T | 11/09/2015 | 01/23/2026 | Active | |
| K5KOO | WOOD, LARRY E | BOULDER | CO | G | KC0ELE | 02/02/2008 | 02/02/2018 | Expired |
| K7DXK | Clements, Alvin J | Boulder | CO | G | KC0JXN | 10/30/2001 | 10/30/2011 | Expired |
| K7KAA | Howard, Carleton J | Boulder | CO | T | KC0OEH | 09/25/2012 | 10/29/2022 | Active |
| KA0DXM | FERGUSON, RICHARD A | BOULDER | CO | E | 11/26/2013 | 01/06/2024 | Active | |
| KA2TZK | Peterson, Joe | Boulder | CO | E | 02/09/1993 | 02/09/2003 | Cancelled | |
| KA5Q | MARTIN, STEVEN G | BOULDER | CO | E | KA0SM | 07/06/2020 | 09/02/2030 | Active |
| KA9MDE | POCHAY, CHRYSTAL L | BOULDER | CO | N | 01/10/2017 | 01/17/2027 | Active | |
| KB0GY | MC QUERRY JR, JAMES P | BOULDER | CO | A | 11/05/2013 | 01/18/2024 | Active | |
| KB0TBA | KALIN, CARL | BOULDER | CO | T | 07/16/2015 | 07/16/2025 | Active | |
| KB1KGK | Mayer, Nathan H | Boulder | CO | T | 08/14/2013 | 08/14/2023 | Active | |
| KB3RAL | ANDERSON, SUSAN E | BOULDER | CO | G | KD6TBB | 05/22/2013 | 03/18/2023 | Active |
| KC0HHR | Beausang, David G | Boulder | CO | T | 12/11/2019 | 02/28/2030 | Active | |
| KC0IZE | Ledru, Pascal | Boulder | CO | G | 10/17/2000 | 10/17/2010 | Expired | |
| KC0JSL | LaRocco, Jeremiah S | Boulder | CO | G | KF0GOM | 09/21/2021 | 09/21/2031 | Active |
| KC0JXN | Clements, Alvin J | Boulder | CO | T | 02/28/2001 | 02/28/2011 | Cancelled | |
| KC0KFS | Stringe, George W | Boulder | CO | E | 03/30/2001 | 03/30/2011 | Cancelled | |
| KC0NRD | Michels, Jennifer L | Boulder | CO | T | 07/02/2002 | 07/02/2012 | Expired | |
| KC0OEH | Howard, Carleton J | Boulder | CO | T | 10/03/2002 | 10/03/2012 | Cancelled | |
| KC0OIN | Thomas, Evan A | Boulder | CO | T | 11/05/2002 | 11/05/2012 | Expired | |
| KC0PKB | Odell, Rebekah R | Boulder | CO | T | 03/18/2003 | 03/18/2013 | Cancelled | |
| KC0RNC | AVELLANA, FJ | BOULDER | CO | T | 01/28/2004 | 01/28/2014 | Expired | |
| KC0RWB | Mach, Loren P | Boulder | CO | T | 03/16/2004 | 03/16/2014 | Expired | |
| KC0SZO | Harris, Scott R | Boulder | CO | E | 08/26/2004 | 08/26/2014 | Cancelled | |
| KC0TNP | Pullen, Lucien P | Boulder | CO | T | 03/24/2015 | 03/24/2025 | Active | |
| KC0TUZ | Pullen, James L | Boulder | CO | T | 03/17/2015 | 03/17/2025 | Active | |
| KC0UYV | Parks, Duncan A | Boulder | CO | T | 08/16/2005 | 08/16/2015 | Expired | |
| KC0UYW | Rochester Iv, Lloyd R | Boulder | CO | G | 08/16/2005 | 08/16/2015 | Cancelled | |
| KC0VHC | Rochester Iv, Lloyd R | Boulder | CO | G | KC0UYW | 08/16/2005 | 08/16/2015 | Expired |
| KC0VLQ | Kelley, John | Boulder | CO | T | 11/15/2005 | 11/15/2015 | Expired | |
| KC0YDR | Kieger, James R | Boulder | CO | G | 03/14/2017 | 03/14/2027 | Active | |
| KC0ZAH | WEBER, TRACY D | BOULDER | CO | T | 11/30/2006 | 11/30/2016 | Cancelled | |
| KC0ZFX | Udall, Bradley H | Boulder | CO | T | 11/09/2016 | 01/08/2027 | Active | |
| KC1KKR | Koo, Giselle | Boulder | CO | G | 10/24/2018 | 10/24/2028 | Active | |
| KD0ARJ | GOEDECKE, WALTER B | BOULDER | CO | G | 05/14/2007 | 05/14/2017 | Expired | |
| KD0DOZ | Clason, Steven H | Boulder | CO | E | 04/07/2008 | 04/07/2018 | Cancelled | |
| KD0JBZ | Lowder, Duncan T | Boulder | CO | T | 10/07/2009 | 10/07/2019 | Expired | |
| KD0NRT | BLUM, ARIELLE M | BOULDER | CO | T | 02/24/2011 | 02/24/2021 | Active | |
| KD0NRW | GERHARDT, DAVID T | BOULDER | CO | G | 02/24/2011 | 02/24/2021 | Active | |
| KD0OCQ | Odell, Kevin M | Boulder | CO | G | 04/04/2011 | 04/04/2021 | Active | |
| KD0OIU | Frushour, Scott | Boulder | CO | G | 03/05/2021 | 04/25/2031 | Active | |
| KD0OKT | Albirdisi, Faisal | Boulder | CO | G | 04/29/2011 | 04/29/2021 | Active | |
| KD0OLP | Willuweit, Eric S | Boulder | CO | T | 04/29/2011 | 04/29/2021 | Active | |
| KD0PDX | DuQue, Joseph J | Boulder | CO | G | 06/08/2021 | 07/19/2031 | Active | |
| KD0RNN | MATHYS, PETER | BOULDER | CO | E | 01/21/2022 | 04/09/2032 | Active | |
| KD0RYP | Kaufhold, Alexandra M | Boulder | CO | T | 05/15/2012 | 05/15/2022 | Active | |
| KD0SBD | Alexander, Spencer R | Boulder | CO | T | 05/22/2012 | 05/22/2022 | Active | |
| KD0SIE | Fisher, Joseph D | Boulder | CO | G | 06/16/2022 | 06/25/2032 | Active | |
| KD0SOP | Fuchs, Franz S | Boulder | CO | T | 07/18/2012 | 07/18/2022 | Active | |
| KD0SVA | Link, Miranda N | Boulder | CO | T | 08/14/2012 | 08/14/2022 | Active | |
| KD0TKZ | Pettus, Samantha M | Boulder | CO | T | 10/19/2012 | 10/19/2022 | Active | |
| KD0TYS | El-Taweel, Abdalla M | Boulder | CO | E | 12/19/2012 | 12/19/2022 | Active | |
| KD0TYT | EL-TAWEEL, HAMAD A | BOULDER | CO | G | 12/19/2012 | 12/19/2022 | Cancelled | |
| KD0VCV | Bailey, Brian N | Boulder | CO | T | 04/17/2013 | 04/17/2023 | Active | |
| KD0VIC | Seraidy, Yousuf R | Boulder | CO | T | 04/29/2013 | 04/29/2023 | Active | |
| KD0VJB | Scheeler, Robert P | Boulder | CO | G | 04/29/2013 | 04/29/2023 | Active | |
| KD0VXG | Laurence III, Roger J | Boulder | CO | T | 06/19/2013 | 06/19/2023 | Active | |
| KD0WKL | Scharf, Bennett J | Boulder | CO | G | 08/14/2013 | 08/14/2023 | Cancelled | |
| KD0YCW | Tower, Francis G | Boulder | CO | E | 11/08/2013 | 11/08/2023 | Cancelled | |
| KD0YMQ | Rao, Jay A | Boulder | CO | G | 12/13/2013 | 12/13/2023 | Active | |
| KD0YQH | Post, Mark P | Boulder | CO | G | 12/27/2013 | 12/27/2023 | Active | |
| KD0ZZY | Ogren, John A | Boulder | CO | E | 04/14/2014 | 04/14/2024 | Cancelled | |
| KD4RHP | BOLTON, BRYCE D | BOULDER | CO | A | 07/30/2013 | 09/21/2023 | Active | |
| KE0ALF | Dunne, Fiona M | Boulder | CO | G | 05/07/2014 | 05/07/2024 | Active | |
| KE0CDC | MITTAL, VIVEK | BOULDER | CO | E | 11/06/2014 | 11/06/2024 | Active | |
| KE0COA | Hemnani, Ritesh G | Boulder | CO | E | 12/17/2014 | 12/17/2024 | Active | |
| KE0EAW | McQuerry, Shawn C | Boulder | CO | G | 04/21/2015 | 04/21/2025 | Active | |
| KE0FPB | EL-TAWEEL, HAMAD A | BOULDER | CO | G | KD0TYT | 12/19/2012 | 12/19/2022 | Cancelled |
| KE0FPZ | EL-TAWEEL, HAMAD A | BOULDER | CO | E | KE0FPB | 12/19/2012 | 12/19/2022 | Cancelled |
| KE0FTP | Holdsworth, James W | Boulder | CO | T | 09/11/2015 | 09/11/2025 | Active | |
| KE0IAN | Anderson, Charles D | Boulder | CO | T | 03/07/2016 | 03/07/2026 | Active | |
| KE0IZQ | Bourgeois, Julianna | Boulder | CO | T | 05/09/2016 | 05/09/2026 | Active | |
| KE0IZZ | Hempe, Calahan D | Boulder | CO | T | 05/09/2016 | 05/09/2026 | Active | |
| KE0JAD | Maurice Mr, Maxwell K | Boulder | CO | G | 05/09/2016 | 05/09/2026 | Active | |
| KE0JAM | Torres, Anthony D | Boulder | CO | T | 05/09/2016 | 05/09/2026 | Active | |
| KE0MBR | Macgregor, Andrew D | Boulder | CO | G | 02/15/2017 | 02/15/2027 | Active | |
| KE0MBS | Macgregor, Lesley M | Boulder | CO | G | 02/15/2017 | 02/15/2027 | Active | |
| KE0MCZ | Taylor, Richard S | Boulder | CO | T | 02/21/2017 | 02/21/2027 | Active | |
| KE0MKH | Subray, Siddhartha | Boulder | CO | T | 03/07/2017 | 03/07/2027 | Active | |
| KE0MKI | Sarangarajan, Vijaykrishnan | Boulder | CO | T | 03/07/2017 | 03/07/2027 | Active | |
| KE0NER | Zheng, Dingyin | Boulder | CO | T | 05/03/2017 | 05/03/2027 | Active | |
| KE0NVK | Gushurst, Kelly | Boulder | CO | G | 07/05/2017 | 07/05/2027 | Active | |
| KE0OEU | Presley Jr, James T | Boulder | CO | T | 08/11/2017 | 08/11/2027 | Active | |
| KE0OKA | Dahl, Austin M | Boulder | CO | T | 09/05/2017 | 09/05/2027 | Active | |
| KE0OYS | Weiss, Alec J | Boulder | CO | T | 11/08/2017 | 11/08/2027 | Active | |
| KE0PHF | Haddab, Abdulaziz | Boulder | CO | T | 11/29/2017 | 11/29/2027 | Active | |
| KE0QJQ | Verkhovsky, Samuel B | Boulder | CO | G | 03/02/2018 | 03/02/2028 | Active | |
| KE0QOI | Smith, Brant S | Boulder | CO | T | 03/19/2018 | 03/19/2028 | Cancelled | |
| KE0ROZ | Caduda, Flavio G | Boulder | CO | E | 05/08/2018 | 05/08/2028 | Cancelled | |
| KE0RWS | Wright, Joseph M | Boulder | CO | T | 05/22/2018 | 05/22/2028 | Active | |
| KE0SKT | Steadman, Laura M | Boulder | CO | T | 07/03/2018 | 07/03/2028 | Active | |
| KE0SKX | Mezger, Melissa A | Boulder | CO | T | 07/03/2018 | 07/03/2028 | Active | |
| KE0SNW | Hall, Richard C | Boulder | CO | G | 07/11/2018 | 07/11/2028 | Active | |
| KE0TAR | Brack, Joseph J | Boulder | CO | E | 09/24/2018 | 09/24/2028 | Active | |
| KE0UEJ | Wilson, Sam | Boulder | CO | T | 01/31/2019 | 01/31/2029 | Active | |
| KE0UJY | Goguely, Emile R | Boulder | CO | T | 02/05/2019 | 02/05/2029 | Active | |
| KE0UYU | Zheng, Wengang | Boulder | CO | T | 03/18/2019 | 03/18/2029 | Active | |
| KE0VFD | Resseguie, Randal R | Boulder | CO | G | 04/02/2019 | 04/02/2029 | Cancelled | |
| KE0WZK | Kurtz, Lawson T | Boulder | CO | T | 10/11/2019 | 10/11/2029 | Cancelled | |
| KE0YXD | Ertz, Brent | Boulder | CO | G | 01/10/2020 | 01/10/2030 | Active | |
| KE0ZIU | Maas, Zachary L | Boulder | CO | G | 02/13/2020 | 02/13/2030 | Active | |
| KE0ZTX | Gambel, Blake A | Boulder | CO | T | 03/11/2020 | 03/11/2030 | Active | |
| KE6BKP | CHAMPAGNE, SHAWN M | Boulder | CO | T | 06/17/2003 | 09/14/2013 | Expired | |
| KE6TRG | LEIFER, MARK C | Boulder | CO | T | 04/04/2015 | 05/05/2025 | Active | |
| KF0EBR | Zimmerer, Robert | Boulder | CO | G | 02/24/2021 | 02/24/2031 | Active | |
| KF0FVK | Wang, Hongli | BOULDER | CO | T | 06/07/2021 | 06/07/2031 | Active | |
| KF0GDA | BLOOMSTON, ALEXANDER | BOULDER | CO | G | 07/12/2021 | 07/12/2031 | Active | |
| KF0GOM | LaRocco, Jeremiah S | Boulder | CO | G | 08/30/2021 | 08/30/2031 | Cancelled | |
| KF0ICZ | Fedor, Adam S | Boulder | CO | T | 02/28/2022 | 02/28/2032 | Active | |
| KF6LHX | PEGG, TIM | Boulder | CO | T | 08/03/2017 | 08/03/2027 | Active | |
| KF7IYK | Klug, Kevin J | Boulder | CO | G | 06/10/2020 | 06/10/2030 | Active | |
| KG3A | CARR, ALFRED K | Boulder | CO | E | WB4BRO | 09/24/2013 | 12/14/2023 | Active |
| KG5YGT | Du Plessis, Carl W | Boulder | CO | T | 02/09/2018 | 02/09/2028 | Active | |
| KJ4DWT | Vildzius, Matthew J | Boulder | CO | T | 05/05/2008 | 05/05/2018 | Expired | |
| KJ6DEV | COSTANZA, BRYAN T | Boulder | CO | T | 08/07/2019 | 11/03/2029 | Active | |
| KJ6PID | ALBEE, MARY J | Boulder | CO | T | 05/12/2021 | 06/01/2031 | Active | |
| KK6AXY | Houser, Adam | Boulder | CO | T | 11/16/2022 | 11/16/2032 | Active | |
| KX0R | FULLER, GEORGE C | BOULDER | CO | E | KB0IH | 02/13/2020 | 03/28/2030 | Active |
| N0BSS | Smith, Brant S | Boulder | CO | T | KE0QOI | 04/10/2018 | 04/10/2028 | Active |
| N0IBT | Perry, David L | BOULDER | CO | E | 08/14/2017 | 11/07/2027 | Active | |
| N0IP | BROWN, MARK J | BOULDER | CO | E | ND7A | 06/25/2002 | 06/25/2012 | Cancelled |
| N0NEA | WAGERS, KEN G | BOULDER | CO | T | 01/26/2021 | 03/29/2031 | Active | |
| N0OUV | PERRY, PHYLLIS J | BOULDER | CO | T | 05/17/2011 | 07/30/2021 | Active | |
| N0QCX | VAN WINKLE, ELEANOR R | Boulder | CO | T | 08/30/2011 | 11/26/2021 | Cancelled | |
| N0XCX | SCHNEIDER, VIVIAN I | BOULDER | CO | T | 03/27/2013 | 06/01/2023 | Active | |
| N0XCY | EISENHUTH, ROBERT B | BOULDER | CO | T | 03/28/2013 | 06/01/2023 | Active | |
| N0YE | NELSON, DONALD R | BOULDER | CO | E | N0UGY | 09/09/2016 | 11/25/2026 | Active |
| N0YIV | PRIEM, STEPHEN R | BOULDER | CO | T | 08/01/2013 | 08/31/2023 | Active | |
| N2BS | KATZ, MITCHELL W | BOULDER | CO | E | 10/02/2018 | 12/18/2028 | Active | |
| N2ETO | Migliorelli, Paul | Boulder | CO | G | 06/21/2018 | 07/30/2028 | Active | |
| N4JFB | MC CUTCHAN JR, JAMES H | BOULDER | CO | G | 06/25/2016 | 07/08/2026 | Active | |
| ND7A | BROWN, MARK J | BOULDER | CO | E | 08/25/2001 | 11/05/2011 | Cancelled | |
| NV0M | VAN WINKLE, HOWARD E | Boulder | CO | E | 05/03/2016 | 07/31/2026 | Active | |
| W0IVJ | THOMPSON, THOMAS L | BOULDER | CO | E | 01/17/2018 | 04/13/2028 | Active | |
| W0KGU | SNIDER, JACK B | BOULDER | CO | G | 06/17/2004 | 07/29/2014 | Expired | |
| W0KMG | Gawlik, Keith M | Boulder | CO | E | WB0YPO | 06/01/2001 | 06/01/2011 | Cancelled |
| W0RIO | COOK, GALEN F | BOULDER | CO | E | WB0RIO | 05/21/2019 | 05/21/2029 | Active |
| W0YVZ | GLAZE, DAVID J | BOULDER | CO | A | 10/10/2014 | 11/21/2024 | Active | |
| W2JKR | SWENSON, THOMAS J | BOULDER | CO | G | N6LJD | 08/21/2020 | 10/01/2030 | Active |
| W5DC | CARTER, DUNCAN L | BOULDER | CO | E | 01/26/2010 | 04/20/2020 | Cancelled | |
| W7UM | BROWN, MARK J | BOULDER | CO | E | N0IP | 05/24/2019 | 08/14/2029 | Active |
| W9GRA | CRESS, JOSEPH A | BOULDER | CO | A | 04/05/2005 | 05/01/2015 | Expired | |
| WA2YUN | BRADLEY, COLIN C | Boulder | CO | E | 08/25/2020 | 08/25/2030 | Active | |
| WA6SUP | Gharavi, Nima | Boulder | CO | E | KG6FMP | 04/07/2001 | 04/07/2011 | Cancelled |
| WB0CDI | Packer, George A | Boulder | CO | A | 01/04/2017 | 01/27/2027 | Active | |
| WB0MMJ | Packer, Marilyn E | BOULDER | CO | G | 01/16/2014 | 04/12/2024 | Active | |
| WB0RIO | COOK, GALEN F | BOULDER | CO | E | 05/06/2016 | 06/28/2026 | Cancelled | |
| WB0YPO | GAWLIK, KEITH M | BOULDER | CO | G | 12/14/1993 | 12/14/2003 | Cancelled | |
| WB2CBU | BORSUK, MICHAEL H | BOULDER | CO | A | 07/09/2013 | 10/05/2023 | Active | |
| WB6IVF | Leary, Gerard L | BOULDER | CO | A | 08/23/2017 | 11/19/2027 | Active | |
| WB6RGC | HANSEN, DOUGLAS C | BOULDER | CO | A | 11/25/2014 | 12/14/2024 | Active | |
| WD0BSA | WEBER, TRACY D | BOULDER | CO | T | KC0ZAH | 08/06/2019 | 09/09/2028 | Active |
| WD9EUV | VORAN, STEPHEN D | BOULDER | CO | G | 10/24/2017 | 11/10/2027 | Active | |
| WX0M | Ogren, John A | Boulder | CO | E | AB0W | 06/28/2014 | 06/28/2024 | Active |