Confidence: Medium · Source: FCC ULS · As of 2026-09-14
AI4SU callsign genealogy
Currently held by MULL, DERRICK T
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 AI4SU's current licensee, walking backwards.
- MULL, DERRICK TTNgranted 2004-04-05cancelled 2007-01-08
Successor callsigns
Callsigns held now by people who previously held AI4SU.
- MULL, DERRICK TMSgranted 2021-02-24