Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KS4LU callsign genealogy
Currently held by SHAFFER, RONALD P
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 KS4LU's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held KS4LU.
- SHAFFER, RONALD PALgranted 2010-08-31cancelled 2020-11-15