Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N4XUX callsign genealogy
Currently held by ALLEN SR, WILLIAM 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 N4XUX's current licensee, walking backwards.
- ALLEN SR, WILLIAM JFLgranted 2010-06-29cancelled 2015-10-02
Successor callsigns
Callsigns held now by people who previously held N4XUX.
All historical holders
Every license row we've seen with the callsign N4XUX, oldest first.
- ALLEN SR, WILLIAM J FL2001-07-09 → cancelled 2010-06-29
- ALLEN SR, WILLIAM J FL2015-10-02 active