uls-tracker
Sign in
Confidence: Medium · Source: FCC ULS · As of 2026-09-12

KG4LEO callsign genealogy

Currently held by Fronk, Ronald K

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 KG4LEO's current licensee, walking backwards.

  1. KQ4MJWcancelled· T
    Leon, Gabriel AFLgranted 2023-11-10cancelled 2023-12-01

Successor callsigns

Callsigns held now by people who previously held KG4LEO.

  1. WX4EMTcancelled· G
    Fronk, Ronald "Keith" KTNgranted 2024-03-07cancelled 2025-02-25
  2. WX4EMTcancelled· G
    Fronk, Ronald KTNgranted 2011-11-05cancelled 2013-06-25

All historical holders

Every license row we've seen with the callsign KG4LEO, oldest first.

  • Fronk, Ronald K TN
    2010-12-15 → cancelled 2011-11-05
  • Fronk, Ronald K TN
    2013-06-25 → cancelled 2014-05-28
  • Leon, Gabriel A FL
    2023-12-01 active
← Back to KG4LEO License history →