Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KB9FDX callsign genealogy
Currently held by Allen, Charles M
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 KB9FDX's current licensee, walking backwards.
- ALLEN, CHARLES MILgranted 2018-02-09cancelled 2018-05-08
Successor callsigns
Callsigns held now by people who previously held KB9FDX.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KB9FDX, oldest first.
- ALLEN, CHARLES M IL1990-06-19 → cancelled 2002-06-20
- Allen, Charles M IL2018-05-08 active