Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KB4YDE callsign genealogy
Currently held by DUNCAN, JAMES 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 KB4YDE's current licensee, walking backwards.
- Duncan, James HPAgranted 2013-06-19cancelled 2013-08-13
Successor callsigns
Callsigns held now by people who previously held KB4YDE.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KB4YDE, oldest first.
- DUNCAN, JAMES H PA1998-01-05 → cancelled 2010-01-06
- Duncan, James H PA2013-08-13 → cancelled 2025-08-14