Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K0JJH callsign genealogy
Currently held by HEINSCH, JOHN J
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 K0JJH's current licensee, walking backwards.
- HEINSCH, JOHN JMNgranted 1994-09-09cancelled 2003-11-01
Successor callsigns
Callsigns held now by people who previously held K0JJH.
No current licensee on record previously held this callsign.