Confidence: Medium · Source: FCC ULS · As of 2026-09-11
K4DPZ callsign genealogy
Currently held by JOHNSTON, HALCYON W
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 K4DPZ'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 K4DPZ.
- K4GNVactiveGAINESVILLE AMATEUR RADIO SOCIETYFLgranted 2019-02-09