Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KC9MMS 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 KC9MMS'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 KC9MMS.
- Krassman, Judith AWIgranted 2007-11-26cancelled 2010-06-22