Confidence: Medium · Source: FCC ULS · As of 2026-09-14
WB4OIT callsign genealogy
Currently held by ARTHUR, MICHAEL 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 WB4OIT's current licensee, walking backwards.
The current licensee has not held any other callsign on record.
Successor callsigns
Callsigns held now by people who previously held WB4OIT.
- ARTHUR, MICHAEL HVAgranted 2020-10-14cancelled 2025-06-25