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

WO3C callsign genealogy

Currently held by Rahn, Darlene L

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 WO3C's current licensee, walking backwards.

  1. KY4XMcancelled· E
    KAEFF JR, CHARLES NKYgranted 2022-04-01cancelled 2023-08-15
  2. WA4HCCcancelled· E
    KAEFF JR, CHARLES NKYgranted 2022-04-01cancelled 2023-05-02
  3. W4EFBcancelled· E
    KAEFF JR, CHARLES NKYgranted 2021-12-03cancelled 2022-04-01
  4. KY4GVcancelled· E
    KAEFF JR, CHARLES NKYgranted 2020-02-28cancelled 2021-12-03

Successor callsigns

Callsigns held now by people who previously held WO3C.

  1. AC4WLcancelled· E
    KAEFF JR, CHARLES NKYgranted 2024-09-04cancelled 2026-01-30

All historical holders

Every license row we've seen with the callsign WO3C, oldest first.

  • Rahn, Darlene L PA
    2011-06-04 → cancelled 2023-07-12
  • KAEFF JR, CHARLES N KY
    2023-08-15 → cancelled 2024-09-04
← Back to WO3C License history →