Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WB4KMA callsign genealogy
Currently held by Hayes, John N
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 WB4KMA's current licensee, walking backwards.
- HAYES, JOHN NFLgranted 2007-06-15cancelled 2009-02-07
Successor callsigns
Callsigns held now by people who previously held WB4KMA.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign WB4KMA, oldest first.
- LESTER, ARTHUR H FL1988-04-05 → cancelled 2000-04-06
- Hayes, John N FL2018-12-11 active