Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KD4XU callsign genealogy
Currently held by HERRING JR, FRANK H
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 KD4XU's current licensee, walking backwards.
- HERRING JR, FRANK HTNgranted 2011-06-07cancelled 2021-03-02
Successor callsigns
Callsigns held now by people who previously held KD4XU.
No current licensee on record previously held this callsign.