Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KX4DU callsign genealogy
Currently held by WOLFE, JEFFREY S
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 KX4DU's current licensee, walking backwards.
- WOLFE, JEFFREY SGAgranted 2012-03-17cancelled 2017-06-05
Successor callsigns
Callsigns held now by people who previously held KX4DU.
No current licensee on record previously held this callsign.