Confidence: Medium · Source: FCC ULS · As of 2026-09-11
KA4SWL callsign genealogy
Currently held by LEERMAKERS, STEPHEN W
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 KA4SWL's current licensee, walking backwards.
- LEERMAKERS, STEPHEN WFLgranted 2008-07-31cancelled 2011-07-01
Successor callsigns
Callsigns held now by people who previously held KA4SWL.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KA4SWL, oldest first.
- HANSEN, LOUIS W WA1992-02-25 → cancelled 2004-02-26
- LEERMAKERS, STEPHEN W FL2021-06-08 → cancelled 2025-07-23