Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W4WWJ callsign genealogy
Currently held by Keller, James M
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 W4WWJ's current licensee, walking backwards.
- Keller, James MFLgranted 2017-05-12cancelled 2018-11-02
Successor callsigns
Callsigns held now by people who previously held W4WWJ.
- Keller, James MFLgranted 2017-05-12cancelled 2018-11-02
All historical holders
Every license row we've seen with the callsign W4WWJ, oldest first.
- Keller, James M FL2016-08-03 → cancelled 2017-05-12
- Keller, James M FL2018-11-02 active