Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KB9WTI callsign genealogy
Currently held by Thorgaard, Matthew N
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 KB9WTI's current licensee, walking backwards.
- INGRAM, WILLIAM TGAgranted 2011-04-18cancelled 2014-03-18
Successor callsigns
Callsigns held now by people who previously held KB9WTI.
- INGRAM, WILLIAM TGAgranted 2020-05-22
All historical holders
Every license row we've seen with the callsign KB9WTI, oldest first.
- Thorgaard, Matthew N WI2000-07-29 → cancelled 2012-07-31
- INGRAM, WILLIAM T GA2014-03-18 → cancelled 2020-05-22