Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KO4JWL callsign genealogy
Currently held by DALLAS, JOHN F
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 KO4JWL's current licensee, walking backwards.
- DALLAS, JOHN FGAgranted 2016-05-07cancelled 2020-12-02
Successor callsigns
Callsigns held now by people who previously held KO4JWL.
- DALLAS, JOHN FGAgranted 2021-01-01