Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W3CSI callsign genealogy
Currently held by JOHNSON, WILLIAM W
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 W3CSI's current licensee, walking backwards.
- JOHNSON, WILLIAM WMDgranted 2006-08-28cancelled 2008-09-30
Successor callsigns
Callsigns held now by people who previously held W3CSI.
No current licensee on record previously held this callsign.