Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WB4CFD callsign genealogy
Currently held by Freire, Claudio E
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 WB4CFD's current licensee, walking backwards.
- Freire, Claudio EGAgranted 2016-10-21cancelled 2020-05-27
Successor callsigns
Callsigns held now by people who previously held WB4CFD.
No current licensee on record previously held this callsign.