Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KB9SUE callsign genealogy
Currently held by PIOTROWSKI, GREGORY C
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 KB9SUE's current licensee, walking backwards.
- ALDRIDGE, SUSAN JILgranted 2009-11-24cancelled 2015-07-24
Successor callsigns
Callsigns held now by people who previously held KB9SUE.
- EIDE, SUSAN MWIgranted 2020-06-02
All historical holders
Every license row we've seen with the callsign KB9SUE, oldest first.
- PIOTROWSKI, GREGORY C IN1998-05-11 → cancelled 2010-05-12
- EIDE, SUSAN M WI2010-06-02 → cancelled 2010-08-03
- ALDRIDGE, SUSAN J IL2025-06-21 active