Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W4ZWW callsign genealogy
Currently held by FERGUSON SR, JAMES G
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 W4ZWW's current licensee, walking backwards.
- Caldwell, Richard RALgranted 2019-11-14cancelled 2022-09-27
Successor callsigns
Callsigns held now by people who previously held W4ZWW.
- FERGUSON SR, JAMES GFLgranted 2016-03-18cancelled 2023-05-08
All historical holders
Every license row we've seen with the callsign W4ZWW, oldest first.
- FERGUSON SR, JAMES G FL2004-02-07 → cancelled 2006-05-02
- Caldwell, Richard R AL2022-09-27 active