Confidence: Medium · Source: FCC ULS · As of 2026-09-14
AI4OJ callsign genealogy
Currently held by Osborne, David W
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 AI4OJ's current licensee, walking backwards.
- Osborne, David WSCgranted 2005-04-15cancelled 2006-02-21
Successor callsigns
Callsigns held now by people who previously held AI4OJ.
No current licensee on record previously held this callsign.