Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W9BTJ callsign genealogy
Currently held by Butler, John T
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 W9BTJ's current licensee, walking backwards.
- Butler, John TOHgranted 2025-12-16cancelled 2026-01-03
Successor callsigns
Callsigns held now by people who previously held W9BTJ.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W9BTJ, oldest first.
- LIND, HARRY WI1988-11-29 → cancelled 2000-11-30
- Butler, John T OH2026-01-03 active