Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KB9UIS callsign genealogy
Currently held by Buis Jr, Donald 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 KB9UIS's current licensee, walking backwards.
- BUIS III, DONALD AILgranted 2005-11-29cancelled 2010-07-07
Successor callsigns
Callsigns held now by people who previously held KB9UIS.
- Buis Jr, Donald AINgranted 2018-05-08
All historical holders
Every license row we've seen with the callsign KB9UIS, oldest first.
- Buis Jr, Donald A IL2008-01-01 → cancelled 2008-06-14
- BUIS III, DONALD A IL2020-06-30 active