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Confidence: Medium · Source: FCC ULS · As of 2026-09-12

KB4UL callsign genealogy

Currently held by KAEFF JR, CHARLES N

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 KB4UL's current licensee, walking backwards.

  1. AD8ERcancelled· E
    KAEFF JR, CHARLES NKYgranted 2018-06-05cancelled 2019-11-19
  2. KX4SWcancelled· E
    KAEFF JR, CHARLES NOHgranted 2018-06-05cancelled 2019-09-17
  3. K3UQactive· E
    Ziadie, Kelly GMDgranted 2021-07-20
  4. KC3NIEcancelled· E
    Ziadie, Kelly GMDgranted 2019-04-22cancelled 2021-07-20

Successor callsigns

Callsigns held now by people who previously held KB4UL.

  1. WA4HCCcancelled· E
    KAEFF JR, CHARLES NKYgranted 2020-02-28cancelled 2021-04-17
  2. W4EFBcancelled· E
    KAEFF JR, CHARLES NKYgranted 2014-07-04cancelled 2015-12-04

All historical holders

Every license row we've seen with the callsign KB4UL, oldest first.

  • KAEFF JR, CHARLES N KY
    2013-06-04 → cancelled 2014-07-04
  • KAEFF JR, CHARLES N KY
    2019-11-19 → cancelled 2020-02-28
← Back to KB4UL License history →