Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KC1AFF callsign genealogy
Currently held by Schumaker, Robert P
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 KC1AFF's current licensee, walking backwards.
- Schumaker, Robert PCTgranted 2010-11-03cancelled 2013-07-17
Successor callsigns
Callsigns held now by people who previously held KC1AFF.
- Schumaker, Robert PTXgranted 2020-08-26cancelled 2020-12-05