uls-tracker
Sign in
Confidence: Medium · Source: FCC ULS · As of 2026-09-12

AF4UR callsign genealogy

Currently held by De Baker, John R

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 AF4UR's current licensee, walking backwards.

  1. KR4HBcancelled· A
    DE BAKER, JOHN RFLgranted 1993-10-26cancelled 2000-05-23
  2. KD4TJP
    no FCC ULS record on file

Successor callsigns

Callsigns held now by people who previously held AF4UR.

No current licensee on record previously held this callsign.

← Back to AF4UR License history →