uls-tracker
Sign in
Confidence: Medium · Source: FCC ULS · As of 2026-09-14

N4ZRJ callsign genealogy

Currently held by HUMPHREY, SUE

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 N4ZRJ's current licensee, walking backwards.

  1. KC4QMK
    no FCC ULS record on file

Successor callsigns

Callsigns held now by people who previously held N4ZRJ.

No current licensee on record previously held this callsign.

← Back to N4ZRJ License history →