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

AB4ZE callsign genealogy

Currently held by SPRENG, ROBERT V

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 AB4ZE's current licensee, walking backwards.

  1. KN4IOexpired· E
    HOLCOMB, WILLIAM HFLgranted 2009-09-29cancelled 2021-09-30
  2. K4NIOcancelled· E
    HOLCOMB, WILLIAM HFLgranted 2000-06-09cancelled 2009-09-29
  3. KC4YTPcancelled· G
    HOLCOMB, WILLIAM HFLgranted 1996-08-14cancelled 2000-06-09

Successor callsigns

Callsigns held now by people who previously held AB4ZE.

No current licensee on record previously held this callsign.

← Back to AB4ZE License history →