Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WA9BTR callsign genealogy
Currently held by KOLDA, JAMES S
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 WA9BTR's current licensee, walking backwards.
- Dittmer, Kimberly SILgranted 2025-06-19cancelled 2025-07-15
Successor callsigns
Callsigns held now by people who previously held WA9BTR.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign WA9BTR, oldest first.
- KOLDA, JAMES S IL2018-05-22 → cancelled 2025-02-10
- Dittmer, Kimberly S IL2025-07-15 active