Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KM4BA callsign genealogy
Currently held by BARROW, JOHN A
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 KM4BA's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held KM4BA.
No current licensee on record previously held this callsign.