Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K4AOC callsign genealogy
Currently held by Lombardo Jr, Vincent 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 K4AOC's current licensee, walking backwards.
- Lombardo Jr, Vincent JSCgranted 2003-05-27cancelled 2007-11-02
Successor callsigns
Callsigns held now by people who previously held K4AOC.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4AOC, oldest first.
- HEAD, WILLIAM F NC1995-07-21 → cancelled 2007-07-22
- Lombardo Jr, Vincent J SC2017-10-11 active