Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W4AOU callsign genealogy
Currently held by BROWN, JOHN L
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 W4AOU's current licensee, walking backwards.
- CAMPBELL, J MICHAELTNgranted 1995-01-18cancelled 2000-07-04
Successor callsigns
Callsigns held now by people who previously held W4AOU.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W4AOU, oldest first.
- BROWN, JOHN L TN1987-12-01 → cancelled 1999-12-02
- CAMPBELL, J MICHAEL TN2020-06-11 active