Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KC9DRB callsign genealogy
Currently held by Poortinga, Robert P
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 KC9DRB's current licensee, walking backwards.
- Baker, Lloyd NINgranted 2017-02-17cancelled 2017-03-24
Successor callsigns
Callsigns held now by people who previously held KC9DRB.
- Poortinga, Robert PINgranted 2003-04-29cancelled 2013-03-26
All historical holders
Every license row we've seen with the callsign KC9DRB, oldest first.
- Poortinga, Robert P IN2003-04-09 → cancelled 2003-04-29
- Baker, Lloyd N IL2017-03-24 active