Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K4LJJ callsign genealogy
Currently held by Giaccio, 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 K4LJJ's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held K4LJJ.
No current licensee on record previously held this callsign.