Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K9EFQ callsign genealogy
Currently held by Heineke, Ralph B
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 K9EFQ's current licensee, walking backwards.
- Heineke, Ralph BILgranted 2021-09-30cancelled 2021-10-19
Successor callsigns
Callsigns held now by people who previously held K9EFQ.
No current licensee on record previously held this callsign.