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

K3BB callsign genealogy

Currently held by Duffy, 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 K3BB's current licensee, walking backwards.

  1. KK3BVMcancelled· E
    Duffy, John HDEgranted 2022-12-23cancelled 2023-02-14
  2. KC3VGLcancelled· T
    Duffy, John HDEgranted 2022-12-03cancelled 2022-12-23

Successor callsigns

Callsigns held now by people who previously held K3BB.

  1. W8FEactive· E
    Daugherty, RussellSCgranted 2021-01-22

All historical holders

Every license row we've seen with the callsign K3BB, oldest first.

  • KOSZEGHY, JOHN FL
    2007-01-13 → cancelled 2015-11-05
  • Daugherty, Russell H SC
    2017-11-25 → cancelled 2021-01-22
  • Duffy, John H DE
    2023-02-14 active
← Back to K3BB License history →