Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WB4JM callsign genealogy
Currently held by Martin, Jeffrey A
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 WB4JM's current licensee, walking backwards.
- Martin, Jeffery AKYgranted 1993-05-04cancelled 2002-08-13
- KA0PUUno FCC ULS record on file
Successor callsigns
Callsigns held now by people who previously held WB4JM.
- Martin, Jeffrey AKYgranted 2025-12-09