Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AB4QI callsign genealogy
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 AB4QI'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 AB4QI.
- HOLDEN, HAROLD BSCgranted 2006-09-13cancelled 2018-11-06