Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W3WDM callsign genealogy
Currently held by McCowan, Jacob 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 W3WDM's current licensee, walking backwards.
- McCowan, Jacob DORgranted 2022-05-28cancelled 2022-06-18
Successor callsigns
Callsigns held now by people who previously held W3WDM.
- McCowan, Jacob DORgranted 2024-04-23