| Call | Name | City | State | Class | Old Call | Effective Date | Expiration Date | Status |
|---|
| KB1YPI | WIPF, CHRISTOPHER | Pasadena | CA | G | | 08/23/2012 | 08/23/2022 | Active |
| KE6LZK | ASPLUND, NILS N | PASADENA | CA | T | | 09/24/2014 | 09/06/2024 | Active |
| KF6ZZE | Caltech Radio Club Special Event | Pasadena | CA | | | 01/22/2000 | 01/22/2010 | Cancelled |
| KG6YTY | Dama, Jonathan A | Pasadena | CA | T | | 03/21/2005 | 03/21/2015 | Expired |
| KJ6EMZ | Seismological Lab Radio Club | Pasadena | CA | | | 01/04/2010 | 01/04/2020 | Cancelled |
| KK6TJQ | Kwan, Stephanie K | Pasadena | CA | T | | 04/20/2015 | 04/20/2025 | Active |
| KK6YVU | Shackford, Sophia M | Pasadena | CA | T | | 11/23/2015 | 11/23/2025 | Active |
| KM6IJE | Domrongkitchaiporn, Sith | Pasadena | CA | T | | 02/16/2017 | 02/16/2027 | Active |
| KM6INJ | Porsandeh Khial, Parham | Pasadena | CA | T | | 02/23/2017 | 02/23/2027 | Active |
| KN6BKM | Jones, Lewis C | Pasadena | CA | T | | 04/23/2019 | 04/23/2029 | Active |
| KN6SOU | Rosenberg, Joshua | PASADENA | CA | T | | 01/31/2022 | 01/31/2032 | Active |
| KN6SWH | Abdul-Ghani, Hamza | PASADENA | CA | T | | 02/22/2022 | 02/22/2032 | Active |
| KN6YAP | Miles, Deborah M | Pasadena | CA | T | KG6KGT | 01/12/2022 | 04/09/2032 | Active |
| W6CIT | Caltech Radio Club Special Event | Pasadena | CA | | KF6ZZE | 12/29/2020 | 12/29/2030 | Active |
| W6UE | CALTECH AMATEUR RADIO CLUB | Pasadena | CA | | | 01/21/2014 | 02/22/2024 | Active |
| WA6EQ | Seismological Lab Radio Club | Pasadena | CA | | KJ6EMZ | 05/19/2020 | 05/19/2030 | Active |
