Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W4JFM callsign genealogy
Currently held by MASUR, JOEL F
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 W4JFM's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held W4JFM.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W4JFM, oldest first.
- MADDEN, JOHN F GA1998-01-08 → cancelled 2010-01-09
- MASUR, JOEL F FL2010-02-17 → cancelled 2022-02-18