Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W4XO callsign genealogy
Currently held by Kister, Alexis P
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 W4XO's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held W4XO.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W4XO, oldest first.
- PENNINGTON SR, BOBBY E SC1994-08-29 → cancelled 2002-06-12
- Kister, Alexis P GA2024-05-30 active