Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WJ4MBO callsign genealogy
Currently held by HAMILTON JR, JAMES R
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 WJ4MBO's current licensee, walking backwards.
- HAMILTON JR, JAMES RNCgranted 2021-01-21cancelled 2021-02-09
Successor callsigns
Callsigns held now by people who previously held WJ4MBO.
No current licensee on record previously held this callsign.