Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K9SQ callsign genealogy
Currently held by Carlson, John H
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 K9SQ's current licensee, walking backwards.
- Carlson, John HTXgranted 1995-10-17cancelled 2002-07-23
Successor callsigns
Callsigns held now by people who previously held K9SQ.
No current licensee on record previously held this callsign.