Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KC9PLC callsign genealogy
Currently held by ARMSTRONG, DEAN W
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 KC9PLC's current licensee, walking backwards.
- Ortiz, Timothy PILgranted 2010-05-06cancelled 2013-03-09
Successor callsigns
Callsigns held now by people who previously held KC9PLC.
All historical holders
Every license row we've seen with the callsign KC9PLC, oldest first.
- ARMSTRONG, DEAN W IL2009-04-01 → cancelled 2009-04-17
- Ortiz, Timothy P IL2013-03-09 → cancelled 2014-06-14