Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KT9B callsign genealogy
Currently held by BAKER, WARREN E
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 KT9B's current licensee, walking backwards.
- Williams, Rick MINgranted 2008-04-07cancelled 2009-04-21
Successor callsigns
Callsigns held now by people who previously held KT9B.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KT9B, oldest first.
- BAKER, WARREN E IL1996-09-30 → cancelled 2008-10-01
- Williams, Rick M IN2019-02-07 active