Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KW4ZM callsign genealogy
Currently held by Drinkard, David S
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 KW4ZM's current licensee, walking backwards.
- Drinkard, David SALgranted 2016-09-12cancelled 2016-11-21
Successor callsigns
Callsigns held now by people who previously held KW4ZM.
No current licensee on record previously held this callsign.