Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KB4DUG callsign genealogy
Currently held by CRUMPLER, DOUGLAS 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 KB4DUG's current licensee, walking backwards.
- CRUMPLER, DOUGLAS LFLgranted 2011-06-29cancelled 2011-07-19
Successor callsigns
Callsigns held now by people who previously held KB4DUG.
No current licensee on record previously held this callsign.