Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K3JCB callsign genealogy
Currently held by Borkowski III, John C
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 K3JCB's current licensee, walking backwards.
- Borkowski III, John CSCgranted 2000-06-20cancelled 2008-04-18
Successor callsigns
Callsigns held now by people who previously held K3JCB.
- Borkowski III, John CSCgranted 2018-12-28