Confidence: Medium · Source: FCC ULS · As of 2026-09-14
N4JJR callsign genealogy
Currently held by MINTZ JR, LEIGHTON
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 N4JJR's current licensee, walking backwards.
- ROONEY IV, JAMES JCOgranted 2009-07-22cancelled 2009-08-25
Successor callsigns
Callsigns held now by people who previously held N4JJR.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N4JJR, oldest first.
- MINTZ JR, LEIGHTON FL1988-11-08 → cancelled 2000-11-09
- ROONEY IV, JAMES J CO2019-06-06 active