Confidence: Medium · Source: FCC ULS · As of 2026-09-14
AI4XL callsign genealogy
Currently held by BROWN, DAVID
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 AI4XL's current licensee, walking backwards.
- BROWN, DAVIDGAgranted 2005-01-21cancelled 2007-04-25
Successor callsigns
Callsigns held now by people who previously held AI4XL.
- BROWN, DAVIDGAgranted 2021-10-16