Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KB7US callsign genealogy
Currently held by SMITH, DONALD J
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 KB7US's current licensee, walking backwards.
- Christman, Ronald WWAgranted 2015-06-19cancelled 2016-11-26
Successor callsigns
Callsigns held now by people who previously held KB7US.
- JOHNSON, JAMES EWAgranted 2021-02-09
All historical holders
Every license row we've seen with the callsign KB7US, oldest first.
- SMITH, DONALD J OR2003-02-11 → cancelled 2015-02-12
- Christman, Ronald W WA2016-11-26 active