Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KS4JJS callsign genealogy
Currently held by SPEED SR, JAMES J
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 KS4JJS's current licensee, walking backwards.
- Speed Sr, James JTNgranted 2017-05-22cancelled 2017-06-09
Successor callsigns
Callsigns held now by people who previously held KS4JJS.
- SPEED SR, JAMES JTNgranted 2019-07-20