Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N4ZXZ callsign genealogy
Currently held by SPOSA, LOUIS D
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 N4ZXZ's current licensee, walking backwards.
- GAVIRIA, EDUARDOFLgranted 2021-01-11cancelled 2021-01-29
Successor callsigns
Callsigns held now by people who previously held N4ZXZ.
- SPOSA, LOUIS DFLgranted 2008-02-20cancelled 2020-02-21
All historical holders
Every license row we've seen with the callsign N4ZXZ, oldest first.
- SPOSA, LOUIS D FL2000-04-28 → cancelled 2008-02-20
- GAVIRIA, EDUARDO FL2021-01-29 active