Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AB5UI callsign genealogy
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 AB5UI's current licensee, walking backwards.
The current licensee has not held any other callsign on record.
Successor callsigns
Callsigns held now by people who previously held AB5UI.
- STERNBERG, TIMOTHY MOKgranted 2008-11-26cancelled 2018-11-16