Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KT4FXX callsign genealogy
Currently held by O'Neill IV, James E
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 KT4FXX's current licensee, walking backwards.
- O'Neill IV, James EWIgranted 2024-11-20cancelled 2024-12-10
Successor callsigns
Callsigns held now by people who previously held KT4FXX.
No current licensee on record previously held this callsign.