Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W4NMA callsign genealogy
Currently held by DAVIDSON, JOHN T
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 W4NMA's current licensee, walking backwards.
- Topley, MarkFLgranted 2020-12-22cancelled 2021-01-09
Successor callsigns
Callsigns held now by people who previously held W4NMA.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W4NMA, oldest first.
- DAVIDSON, JOHN T FL2006-05-04 → cancelled 2018-08-01
- Topley, Mark FL2021-01-09 active