Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AI4SQ callsign genealogy
Currently held by CLARK, DAVID 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 AI4SQ's current licensee, walking backwards.
The current licensee has not held any other callsign on record.
Successor callsigns
Callsigns held now by people who previously held AI4SQ.
- CLARK, DAVID JFLgranted 2006-12-27cancelled 2018-12-28