Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W4DSR callsign genealogy
Currently held by Ferguson, William H
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 W4DSR's current licensee, walking backwards.
- REINHART, DAVID SVAgranted 2014-01-13cancelled 2019-12-03
Successor callsigns
Callsigns held now by people who previously held W4DSR.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W4DSR, oldest first.
- Ferguson, William H FL2007-08-22 → cancelled 2019-11-15
- REINHART, DAVID S NJ2019-12-03 active