Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W7JLS callsign genealogy
Currently held by SWITZER, JOHN L
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 W7JLS's current licensee, walking backwards.
- SWITZER, JOHN LORgranted 2004-12-02cancelled 2006-05-27
Successor callsigns
Callsigns held now by people who previously held W7JLS.
- SPENGLER, JERRY LIDgranted 2004-05-08cancelled 2016-05-10
All historical holders
Every license row we've seen with the callsign W7JLS, oldest first.
- SPENGLER, JERRY L ID1998-10-27 → cancelled 2004-05-08
- SWITZER, JOHN L OR2026-03-24 active