Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KD5FXM callsign genealogy
Currently held by Masuoka, Fred
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 KD5FXM's current licensee, walking backwards.
- Masuoka, FredOHgranted 2021-09-07cancelled 2021-09-28
Successor callsigns
Callsigns held now by people who previously held KD5FXM.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KD5FXM, oldest first.
- AIRHART, KATHY D TX1998-12-16 → cancelled 2010-12-17
- Masuoka, Fred OH2021-09-28 active