Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N9CSW callsign genealogy
Currently held by Williams, David A
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 N9CSW's current licensee, walking backwards.
- Williams, David AWIgranted 2017-06-13cancelled 2020-12-12
Successor callsigns
Callsigns held now by people who previously held N9CSW.
No current licensee on record previously held this callsign.