Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4ZSW callsign genealogy
Currently held by McDow Jr, Alvis E
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 K4ZSW's current licensee, walking backwards.
- McDow Jr, Alvis EFLgranted 2018-08-13cancelled 2018-09-01
Successor callsigns
Callsigns held now by people who previously held K4ZSW.
No current licensee on record previously held this callsign.