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

KJ4EJ callsign genealogy

Currently held by VARGAS, 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 KJ4EJ's current licensee, walking backwards.

  1. NT4MVcancelled· A
    VARGAS, MARK AFLgranted 2020-05-22cancelled 2020-10-09
  2. KD2DIcancelled· A
    VARGAS, MARK AFLgranted 2013-01-10cancelled 2020-05-22
  3. WB2SFF
    no FCC ULS record on file

Successor callsigns

Callsigns held now by people who previously held KJ4EJ.

No current licensee on record previously held this callsign.

All historical holders

Every license row we've seen with the callsign KJ4EJ, oldest first.

  • WILLIS JR, CLARENCE A FL
    1999-11-06 → cancelled 2012-01-18
  • VARGAS, MARK A FL
    2020-10-09 active
← Back to KJ4EJ License history →