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Confidence: Medium · Source: FCC ULS · As of 2026-09-14

N4UAJ callsign genealogy

Currently held by BARR, WILLIAM L

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 N4UAJ's current licensee, walking backwards.

  1. KC4BIO
    no FCC ULS record on file

Successor callsigns

Callsigns held now by people who previously held N4UAJ.

No current licensee on record previously held this callsign.

← Back to N4UAJ License history →