Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AI4SF callsign genealogy
Currently held by MacLane, William 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 AI4SF's current licensee, walking backwards.
- MacLane, William BFLgranted 2005-05-16cancelled 2006-10-10
Successor callsigns
Callsigns held now by people who previously held AI4SF.
- MacLane, William BMIgranted 2016-10-13