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

KY4XM 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 KY4XM's current licensee, walking backwards.

  1. WA4HCCcancelled· E
    KAEFF JR, CHARLES NKYgranted 2022-04-01cancelled 2023-05-02
  2. W4EFBcancelled· E
    KAEFF JR, CHARLES NKYgranted 2021-12-03cancelled 2022-04-01
  3. KY4GVcancelled· E
    KAEFF JR, CHARLES NKYgranted 2020-02-28cancelled 2021-12-03

Successor callsigns

Callsigns held now by people who previously held KY4XM.

  1. WO3Ccancelled· E
    KAEFF JR, CHARLES NKYgranted 2023-08-15cancelled 2024-09-04
← Back to KY4XM License history →