Confidence: Medium · Source: FCC ULS · As of 2026-09-15
KC9CHW callsign genealogy
Currently held by KARLSON, ROBERT J
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 KC9CHW's current licensee, walking backwards.
- KARLSON, ROBERT JILgranted 2002-08-21cancelled 2002-08-22
Successor callsigns
Callsigns held now by people who previously held KC9CHW.
No current licensee on record previously held this callsign.