Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KU4OB callsign genealogy
Currently held by SALAS, EFRAIN
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 KU4OB's current licensee, walking backwards.
The current licensee has not held any other callsign on record.
Successor callsigns
Callsigns held now by people who previously held KU4OB.
- SALAS, EFRAINFLgranted 2008-01-11cancelled 2020-03-19