Confidence: Medium · Source: FCC ULS · As of 2026-09-14
WO4I callsign genealogy
Currently held by Strickland, Frank A
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 WO4I's current licensee, walking backwards.
- Butler, Bradley KTNgranted 2007-12-28cancelled 2011-04-02
Successor callsigns
Callsigns held now by people who previously held WO4I.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign WO4I, oldest first.
- Strickland, Frank A GA2004-04-19 → cancelled 2009-03-14
- Butler, Bradley K TN2021-02-02 active