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Confidence: Medium · Source: FCC ULS · As of 2026-09-11

AF4QL callsign genealogy

Currently held by OBERNDORFER, JOHN C

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 AF4QL's current licensee, walking backwards.

  1. AA7IBcancelled· E
    OBERNDORFER, JOHN CUTgranted 1991-04-09cancelled 1999-12-09
  2. WF5Sactive· E
    Miller, Keith JGAgranted 2023-02-07
  3. KQ4EHDcancelled· E
    Miller, Keith JGAgranted 2022-11-10cancelled 2023-02-07

Successor callsigns

Callsigns held now by people who previously held AF4QL.

  1. WK5Aactive· E
    OBERNDORFER, JOHN CNCgranted 2021-01-05
← Back to AF4QL License history →