Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4HFD callsign genealogy
Currently held by Johnston, Ryan R
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 K4HFD's current licensee, walking backwards.
- Johnston, Ryan RTNgranted 2003-08-13cancelled 2006-08-29
Successor callsigns
Callsigns held now by people who previously held K4HFD.
No current licensee on record previously held this callsign.