Confidence: Medium · Source: FCC ULS · As of 2026-09-14
AI4SJ callsign genealogy
Currently held by WOOD, FRANK 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 AI4SJ's current licensee, walking backwards.
- WOOD, FRANK AFLgranted 2006-10-27cancelled 2006-10-27
Successor callsigns
Callsigns held now by people who previously held AI4SJ.
- WOOD, FRANK AMIgranted 2011-11-15cancelled 2023-11-16