Confidence: Medium · Source: FCC ULS · As of 2026-09-14
N4TRS callsign genealogy
Currently held by BALLOU, DONALD K
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 N4TRS's current licensee, walking backwards.
- SHULER JR, RALPH WSCgranted 2014-12-16cancelled 2023-09-01
Successor callsigns
Callsigns held now by people who previously held N4TRS.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N4TRS, oldest first.
- BALLOU, DONALD K UT2008-07-17 → cancelled 2020-09-11
- SHULER JR, RALPH W SC2023-09-01 active