Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W4SDY callsign genealogy
Currently held by Yarbrough, Stephen D
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 W4SDY's current licensee, walking backwards.
- Yarbrough, Stephen DALgranted 2016-01-11cancelled 2016-01-29
Successor callsigns
Callsigns held now by people who previously held W4SDY.
No current licensee on record previously held this callsign.