Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KJ4JWM callsign genealogy
Currently held by MAYER III, JOSEPH W
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 KJ4JWM's current licensee, walking backwards.
- MILLIGAN, JAMES WNCgranted 2014-11-21cancelled 2014-12-09
Successor callsigns
Callsigns held now by people who previously held KJ4JWM.
- Mayer III, Joseph WTXgranted 2009-10-27cancelled 2016-10-29
All historical holders
Every license row we've seen with the callsign KJ4JWM, oldest first.
- MAYER III, JOSEPH W NC2008-04-15 → cancelled 2009-10-27
- MILLIGAN, JAMES W NC2024-11-19 active