Confidence: Medium · Source: FCC ULS · As of 2026-09-14
WU4O callsign genealogy
Currently held by HARA, BENJI
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 WU4O's current licensee, walking backwards.
- BAKER, JEFF JTNgranted 1999-09-08cancelled 2002-04-04
Successor callsigns
Callsigns held now by people who previously held WU4O.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign WU4O, oldest first.
- HARA, BENJI FL1989-03-07 → cancelled 2001-03-08
- BAKER, JEFF J TN2022-03-08 active