Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KN4SC callsign genealogy
Currently held by HEILBORN, ALEJANDRO
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 KN4SC's current licensee, walking backwards.
- KK4BUMcancelledUPSTATE CAROLINA AMATEUR RADIO SOCIETYSCgranted 2011-04-28cancelled 2015-04-03
Successor callsigns
Callsigns held now by people who previously held KN4SC.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KN4SC, oldest first.
- HEILBORN, ALEJANDRO FL2000-10-19 → cancelled 2012-11-07
- UPSTATE CAROLINA AMATEUR RADIO SOCIETY SC2015-04-03 active