Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AD9FB callsign genealogy
Currently held by ZWIEG, ANDREW 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 AD9FB's current licensee, walking backwards.
- ZWIEG, ANDREW BWIgranted 2024-05-07cancelled 2024-07-02
Successor callsigns
Callsigns held now by people who previously held AD9FB.
- ZWIEG, ANDREW BWIgranted 2024-07-20