Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AI4LG callsign genealogy
Currently held by Butz, Richard L
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 AI4LG's current licensee, walking backwards.
- Butz, Richard LFLgranted 2005-05-31cancelled 2005-07-20
Successor callsigns
Callsigns held now by people who previously held AI4LG.
- Butz, Richard LFLgranted 2018-08-28