Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W4IUL callsign genealogy
Currently held by Butler Jr, Walter M
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 W4IUL's current licensee, walking backwards.
- Butler Jr., Walter MALgranted 2015-03-31cancelled 2016-03-01
Successor callsigns
Callsigns held now by people who previously held W4IUL.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W4IUL, oldest first.
- LEE, JAMES F AL1987-11-03 → cancelled 1999-11-04
- Butler Jr, Walter M AL2026-05-16 active