Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N4SYM callsign genealogy
Currently held by TOLLESON JR, 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 N4SYM's current licensee, walking backwards.
- KB4KYVno FCC ULS record on file
Successor callsigns
Callsigns held now by people who previously held N4SYM.
- TOLLESON JR, WILLIAM JSCgranted 2017-01-24