Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4AXO callsign genealogy
Currently held by Riner, William
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 K4AXO's current licensee, walking backwards.
- SHAFFER, JAMES AFLgranted 2018-01-11cancelled 2025-03-04
Successor callsigns
Callsigns held now by people who previously held K4AXO.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4AXO, oldest first.
- Riner, William VA2006-12-05 → cancelled 2019-02-12
- SHAFFER, JAMES A FL2025-03-04 active