Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KI6CM callsign genealogy
Currently held by Cheng, Clifford
The FCC publishes a previous_call_sign on
every amateur license — a self-link to the licensee's prior callsign.
Following those links produces the chain below.
Previous callsigns
Older callsigns held by KI6CM's current licensee, walking backwards.
- Murphey, Charles ECAgranted 2007-03-15cancelled 2011-09-03
Successor callsigns
Callsigns held now by people who previously held KI6CM.
- CHENG, CLIFFCAgranted 2007-05-12cancelled 2008-07-15
All historical holders
Every license row we've seen with the callsign KI6CM, oldest first.
- Cheng, Clifford CA2005-09-01 → cancelled 2007-05-12
- Murphey, Charles E CA2021-07-26 active