Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KB1GMJ callsign genealogy
Currently held by Manabe, Keith
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 KB1GMJ's current licensee, walking backwards.
- Manabe, KeithMAgranted 2000-12-28cancelled 2001-03-22
Successor callsigns
Callsigns held now by people who previously held KB1GMJ.
- Manabe, KeithMAgranted 2010-12-28cancelled 2022-12-29