uls-tracker
Sign in
Confidence: Medium · Source: FCC ULS · As of 2026-09-11

KB4FBI callsign genealogy

Currently held by LAMBERT, JOHN H

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 KB4FBI's current licensee, walking backwards.

  1. AC4VZcancelled· E
    LAMBERT, JOHN HSCgranted 2014-01-29cancelled 2014-02-19
  2. N4YMSactive· E
    LAMBERT, JOHN HSCgranted 2022-10-04

Successor callsigns

Callsigns held now by people who previously held KB4FBI.

  1. N4YMSactive· E
    LAMBERT, JOHN HSCgranted 2022-10-04

All historical holders

Every license row we've seen with the callsign KB4FBI, oldest first.

  • EARLY JR, DOYET A GA
    1996-04-15 → cancelled 2008-04-16
  • LAMBERT, JOHN H SC
    2014-02-19 → cancelled 2022-10-04
← Back to KB4FBI License history →