Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KW4WLD callsign genealogy
Currently held by DUFFIE, WARREN L
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 KW4WLD's current licensee, walking backwards.
- DUFFIE, WARREN LVAgranted 2015-12-07cancelled 2015-12-25
Successor callsigns
Callsigns held now by people who previously held KW4WLD.
No current licensee on record previously held this callsign.