Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KB1UZ callsign genealogy
Currently held by ARRUDA, JAMES M
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 KB1UZ's current licensee, walking backwards.
- ARRUDA, JAMES MRIgranted 2015-09-30cancelled 2018-03-27
Successor callsigns
Callsigns held now by people who previously held KB1UZ.
- ARRUDA, JAMES MRIgranted 2015-09-30cancelled 2018-03-27
All historical holders
Every license row we've seen with the callsign KB1UZ, oldest first.
- ARRUDA, JAMES M RI2015-09-30 → cancelled 2018-02-23
- ARRUDA, JAMES M RI2018-03-27 active