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

K4AXX callsign genealogy

Currently held by LEFKOWITZ, HAL 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 K4AXX's current licensee, walking backwards.

  1. W4DOJcancelled· G
    RUIZ JR, HOMEROVAgranted 2009-08-28cancelled 2019-02-20
  2. KI4OBOcancelled· G
    Ruiz Jr, HomeroVAgranted 2006-03-13cancelled 2009-08-28

Successor callsigns

Callsigns held now by people who previously held K4AXX.

No current licensee on record previously held this callsign.

All historical holders

Every license row we've seen with the callsign K4AXX, oldest first.

  • LEFKOWITZ, HAL A FL
    2002-03-30 → cancelled 2014-04-01
  • RUIZ JR, HOMERO VA
    2019-02-20 active
← Back to K4AXX License history →