Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KJ6KMA callsign genealogy
Currently held by Underwood, John E
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 KJ6KMA's current licensee, walking backwards.
- Underwood, John ECAgranted 2010-03-15cancelled 2010-04-09
Successor callsigns
Callsigns held now by people who previously held KJ6KMA.
- Underwood, John ECAgranted 2020-05-12