Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W0SDJ callsign genealogy
Currently held by GFELLER, NORMAN 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 W0SDJ's current licensee, walking backwards.
- JOHNSON, STEVEN DIAgranted 2020-06-04cancelled 2020-09-22
Successor callsigns
Callsigns held now by people who previously held W0SDJ.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W0SDJ, oldest first.
- GFELLER, NORMAN G IA1996-09-11 → cancelled 2008-09-12
- JOHNSON, STEVEN D IA2020-09-22 active