Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KT4JJ callsign genealogy
Currently held by JOHNSON, JOHN J
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 KT4JJ's current licensee, walking backwards.
- JOHNSON, JOHN JNCgranted 2014-07-28cancelled 2015-03-13
Successor callsigns
Callsigns held now by people who previously held KT4JJ.
- GIGLIOTTI, GIUSEPPEFLgranted 2018-12-03
All historical holders
Every license row we've seen with the callsign KT4JJ, oldest first.
- JOHNSON, JOHN J NC2025-02-01 active
- GIGLIOTTI, GIUSEPPE— → cancelled 1999-02-10