Confidence: Medium · Source: FCC ULS · As of 2026-09-14
WB4OZM callsign genealogy
Currently held by Sturm, David 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 WB4OZM's current licensee, walking backwards.
- Sturm, David WGAgranted 2015-03-24cancelled 2015-05-19
Successor callsigns
Callsigns held now by people who previously held WB4OZM.
No current licensee on record previously held this callsign.