Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AI4JO callsign genealogy
Currently held by Dayton, Sparrow B
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 AI4JO's current licensee, walking backwards.
- Dayton, Sparrow BFLgranted 2001-12-18cancelled 2005-03-15
Successor callsigns
Callsigns held now by people who previously held AI4JO.
- Dayton, Sparrow BFLgranted 2025-03-04