Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K4UUJ callsign genealogy
Currently held by Walker, Matthew B
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 K4UUJ's current licensee, walking backwards.
- Walker, Matthew BGAgranted 2009-05-19cancelled 2009-06-26
Successor callsigns
Callsigns held now by people who previously held K4UUJ.
No current licensee on record previously held this callsign.