Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W4AMA callsign genealogy
Currently held by JOHNSON, FLORIAN 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 W4AMA's current licensee, walking backwards.
- Alterman, Adam MALgranted 2009-12-01cancelled 2011-07-01
Successor callsigns
Callsigns held now by people who previously held W4AMA.
- JOHNSON, FLORIAN MNCgranted 2006-05-19cancelled 2009-02-24
All historical holders
Every license row we've seen with the callsign W4AMA, oldest first.
- JOHNSON, FLORIAN M NC2003-01-31 → cancelled 2006-05-19
- Alterman, Adam M AL2021-04-05 active
- SEXTON, MICHAEL S— → cancelled 1998-06-18