Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KK4HNI callsign genealogy
Currently held by HELMS III, WILLIAM F
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 KK4HNI's current licensee, walking backwards.
The current licensee has not held any other callsign on record.
Successor callsigns
Callsigns held now by people who previously held KK4HNI.
- HELMS III, WILLIAM FNCgranted 2023-10-19cancelled 2024-06-15