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Confidence: Medium · Source: FCC ULS · As of 2026-09-14

AJ4ZQ callsign genealogy

Currently held by Johnson, Mark A

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 AJ4ZQ's current licensee, walking backwards.

  1. KI4ZTQcancelled· E
    Johnson, Mark AGAgranted 2010-04-06cancelled 2010-06-07
  2. KG4IIXcancelled· G
    Johnson, Markq AGAgranted 2000-06-22cancelled 2007-10-09

Successor callsigns

Callsigns held now by people who previously held AJ4ZQ.

No current licensee on record previously held this callsign.

← Back to AJ4ZQ License history →