Confidence: Medium · Source: FCC ULS · As of 2026-09-14
AJ4HU callsign genealogy
Currently held by Halstead, Robert A
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 AJ4HU's current licensee, walking backwards.
- Halstead, Robert AVAgranted 2008-04-28cancelled 2008-05-10
Successor callsigns
Callsigns held now by people who previously held AJ4HU.
- Halstead, Robert ASCgranted 2018-05-15