Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AD4DI callsign genealogy
Currently held by MASON, LARRY W
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 AD4DI's current licensee, walking backwards.
- KK4BPno FCC ULS record on file
Successor callsigns
Callsigns held now by people who previously held AD4DI.
- MASON, LARRY WGAgranted 2002-10-22cancelled 2003-01-17