Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4ZPW callsign genealogy
Currently held by Washburn, Zachary P
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 K4ZPW's current licensee, walking backwards.
- Washburn, Zachary PFLgranted 2023-02-14cancelled 2023-03-17
Successor callsigns
Callsigns held now by people who previously held K4ZPW.
No current licensee on record previously held this callsign.