Confidence: Medium · Source: FCC ULS · As of 2026-09-14
AI4HQ callsign genealogy
Currently held by APCO INTERNATIONAL AMATEUR RADIO CLUB
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 AI4HQ's current licensee, walking backwards.
- Kyser Jr, Malcolm CALgranted 2004-10-13cancelled 2004-11-03
Successor callsigns
Callsigns held now by people who previously held AI4HQ.
- Kyser Jr, Malcolm CALgranted 2015-01-07
All historical holders
Every license row we've seen with the callsign AI4HQ, oldest first.
- APCO INTERNATIONAL AMATEUR RADIO CLUB FL1997-02-12 → cancelled 2000-09-18
- Kyser Jr, Malcolm C AL2004-10-13 → cancelled 2005-03-22