Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KC9A callsign genealogy
Currently held by JOHNSON, JOHN G
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 KC9A's current licensee, walking backwards.
- Tanaka, ToshiharuORgranted 2013-05-08cancelled 2013-05-29
Successor callsigns
Callsigns held now by people who previously held KC9A.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KC9A, oldest first.
- JOHNSON, JOHN G WI2001-10-22 → cancelled 2013-05-08
- Tanaka, Toshiharu OR2023-03-07 active