Confidence: Medium · Source: FCC ULS · As of 2026-09-14
AB9WU callsign genealogy
Currently held by Krassman, Judith A
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 AB9WU's current licensee, walking backwards.
- Krassman, Judith AWIgranted 2007-11-26cancelled 2010-06-01
Successor callsigns
Callsigns held now by people who previously held AB9WU.
- Krassman, Judith AWIgranted 2020-06-09