Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KM4HFF callsign genealogy
Currently held by Parks, William H
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 KM4HFF's current licensee, walking backwards.
- Parks, William HVAgranted 2009-03-09cancelled 2015-01-15
Successor callsigns
Callsigns held now by people who previously held KM4HFF.
- Parks, William HCOgranted 2018-03-16