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

N4THR callsign genealogy

Currently held by LINDBERG, ROBERT A

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 N4THR's current licensee, walking backwards.

  1. KB4RLH
    no FCC ULS record on file

Successor callsigns

Callsigns held now by people who previously held N4THR.

  1. W4RBLexpired· A
    LINDBERG, ROBERT AVAgranted 2012-02-16cancelled 2024-04-17
← Back to N4THR License history →