Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N9BSD callsign genealogy
Currently held by JOHNSON, THOMAS R
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 N9BSD's current licensee, walking backwards.
- Thompson, Douglas IWIgranted 2009-01-05cancelled 2009-09-29
Successor callsigns
Callsigns held now by people who previously held N9BSD.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N9BSD, oldest first.
- JOHNSON, THOMAS R IL1991-04-09 → cancelled 2003-04-10
- Thompson Turkington, Douglas I WI2019-11-15 active