Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KA3FDX callsign genealogy
Currently held by Niebauer, Amber
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 KA3FDX's current licensee, walking backwards.
- Niebauer, AmberPAgranted 2026-01-10cancelled 2026-01-30
Successor callsigns
Callsigns held now by people who previously held KA3FDX.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KA3FDX, oldest first.
- NIEBAUER, THEODORE J PA1994-11-10 → cancelled 2006-11-13
- Niebauer, Amber PA2026-01-30 active