Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KA4FIX callsign genealogy
Currently held by UNDERHILL, JAMES 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 KA4FIX's current licensee, walking backwards.
- Fixman, KentVAgranted 2020-06-12cancelled 2020-08-01
Successor callsigns
Callsigns held now by people who previously held KA4FIX.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KA4FIX, oldest first.
- UNDERHILL, JAMES M GA1996-01-23 → cancelled 2008-01-24
- Fixman, Kent VA2020-08-01 active