Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KJ4TAC callsign genealogy
Currently held by KAVANAGH, JOHN P
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 KJ4TAC's current licensee, walking backwards.
- EDWARDS, WILLIAM MSCgranted 2019-04-17cancelled 2019-05-14
Successor callsigns
Callsigns held now by people who previously held KJ4TAC.
- KAVANAGH Mr., JOHN PNCgranted 2020-07-14
All historical holders
Every license row we've seen with the callsign KJ4TAC, oldest first.
- KAVANAGH, JOHN P NC2010-03-15 → cancelled 2010-10-01
- EDWARDS, WILLIAM M SC2019-05-14 active