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

K4JL callsign genealogy

Currently held by VIOLA, MICHAEL F

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 K4JL's current licensee, walking backwards.

  1. AF4THcancelled· E
    VIOLA, MICHAEL FFLgranted 1992-12-29cancelled 2000-05-30
  2. KA2CHDcancelled· A
    VIOLA, MICHAEL FFLgranted 1992-12-29cancelled 2000-05-11

Successor callsigns

Callsigns held now by people who previously held K4JL.

No current licensee on record previously held this callsign.

All historical holders

Every license row we've seen with the callsign K4JL, oldest first.

  • RUMBLE, GABRIEL P GA
    1988-05-10 → cancelled 2000-05-11
  • VIOLA, MICHAEL F NC
    2020-05-15 active
← Back to K4JL License history →