Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WB4NSZ callsign genealogy
Currently held by Colson III, Robert H
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 WB4NSZ's current licensee, walking backwards.
- Colson III, Robert HNCgranted 2024-01-09cancelled 2024-01-27
Successor callsigns
Callsigns held now by people who previously held WB4NSZ.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign WB4NSZ, oldest first.
- COLSON, ROBERT H NC2004-05-12 → cancelled 2016-07-16
- Colson III, Robert H NC2024-01-27 active