Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KQ4ISM callsign genealogy
Currently held by CHAPMAN, CHRISTOPHER L
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 KQ4ISM's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held KQ4ISM.
No current licensee on record previously held this callsign.