Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KB1UMZ callsign genealogy
Currently held by Greater Westfield Medical Reserve Corps
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 KB1UMZ'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 KB1UMZ.
- K1WSUexpiredGreater Westfield Medical Reserve CorpsMAgranted 2013-06-01cancelled 2025-06-03