Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KC9PHM callsign genealogy
Currently held by Penkala, Leo 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 KC9PHM's current licensee, walking backwards.
The current licensee has not held any other callsign on record.
Successor callsigns
Callsigns held now by people who previously held KC9PHM.
- Penkala, Leo WILgranted 2009-04-18cancelled 2011-05-10