Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K4YJA callsign genealogy
Currently held by Simpson JR, William 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 K4YJA's current licensee, walking backwards.
- Simpson, William HFLgranted 2025-04-01cancelled 2025-04-19
Successor callsigns
Callsigns held now by people who previously held K4YJA.
No current licensee on record previously held this callsign.