Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KJ5REK callsign genealogy
Currently held by Duffey, William C
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 KJ5REK's current licensee, walking backwards.
- Duffey, William CLAgranted 2022-12-14cancelled 2026-07-21
Successor callsigns
Callsigns held now by people who previously held KJ5REK.
No current licensee on record previously held this callsign.