Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KC0PYK callsign genealogy
Currently held by Rieff, Thomas M
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 KC0PYK'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 KC0PYK.
- Rieff, Thomas MMNgranted 2004-06-26cancelled 2006-09-09