Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KC3UCP callsign genealogy
Currently held by PROSTKO, DOUGLAS
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 KC3UCP's current licensee, walking backwards.
- PROSTKO, DOUGLASPAgranted 2022-04-18cancelled 2022-05-09
Successor callsigns
Callsigns held now by people who previously held KC3UCP.
- PROSTKO, DOUGLASPAgranted 2022-05-28cancelled 2022-08-20