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

K5AI callsign genealogy

Currently held by PORTER, RONALD D

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 K5AI's current licensee, walking backwards.

  1. AB3TAcancelled· E
    Helmke, Martin FPAgranted 2013-06-26cancelled 2015-02-07
  2. KC3AVOcancelled· E
    Helmke, Martin FPAgranted 2013-06-26cancelled 2013-08-28

Successor callsigns

Callsigns held now by people who previously held K5AI.

No current licensee on record previously held this callsign.

All historical holders

Every license row we've seen with the callsign K5AI, oldest first.

  • BALL SR, JOHN E LA
    1991-09-03 → cancelled 2000-07-05
  • PORTER, RONALD D LA
    2003-01-17 → cancelled 2015-01-21
  • Helmke, Martin F PA
    2025-03-14 active
← Back to K5AI License history →