Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N4FWB callsign genealogy
Currently held by BIRDSALL, FREDERICK W
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 N4FWB's current licensee, walking backwards.
- BIRDSALL, FREDERICK WFLgranted 2005-01-19cancelled 2012-09-04
Successor callsigns
Callsigns held now by people who previously held N4FWB.
No current licensee on record previously held this callsign.