Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KC9QZU callsign genealogy
Currently held by SIMPSON, RANDALL 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 KC9QZU's current licensee, walking backwards.
- SIMPSON, RANDALL JINgranted 2009-11-02cancelled 2009-11-25
Successor callsigns
Callsigns held now by people who previously held KC9QZU.
- SIMPSON, RANDALL JINgranted 2019-09-23