Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W4WKW callsign genealogy
Currently held by Johnston, Donald 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 W4WKW's current licensee, walking backwards.
- Johnston, Donald RALgranted 2018-03-06cancelled 2025-02-21
Successor callsigns
Callsigns held now by people who previously held W4WKW.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W4WKW, oldest first.
- HARRIS, WALTER T AL2005-03-10 → cancelled 2017-06-01
- Johnston, Donald R AL2025-02-21 active