Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4JMB callsign genealogy
Currently held by Ballard, James M
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 K4JMB's current licensee, walking backwards.
- Ballard, James MFLgranted 2022-12-09cancelled 2022-12-30
Successor callsigns
Callsigns held now by people who previously held K4JMB.
- BAUER, JAY MHIgranted 2020-11-06
All historical holders
Every license row we've seen with the callsign K4JMB, oldest first.
- BAUER, JAY M GA2013-02-22 → cancelled 2020-11-06
- Ballard, James M FL2022-12-30 active