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

AB4ZJ callsign genealogy

Currently held by CROWDER, JIMMIE B

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 AB4ZJ's current licensee, walking backwards.

  1. AF4ASactive· E
    STRAZZULLA, ANTHONY MFLgranted 2022-10-05
  2. KK4LLSactive· E
    SHARP JR, MICHAEL RFLgranted 2026-03-14
  3. KM4TLKcancelled· T
    Sharp Jr, Michael RFLgranted 2016-04-21cancelled 2016-05-10

Successor callsigns

Callsigns held now by people who previously held AB4ZJ.

  1. N4ZZWactive· E
    MARTIN, ROBERT DALgranted 2020-08-10
← Back to AB4ZJ License history →