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

W4RBX callsign genealogy

Currently held by Sult, Donald B

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 W4RBX's current licensee, walking backwards.

  1. KX4PEcancelled· E
    Sult, Donald BVAgranted 2022-11-01cancelled 2023-03-31
  2. KK4LOTcancelled· E
    Sult, Donald BVAgranted 2012-09-14cancelled 2019-01-30

Successor callsigns

Callsigns held now by people who previously held W4RBX.

No current licensee on record previously held this callsign.

All historical holders

Every license row we've seen with the callsign W4RBX, oldest first.

  • STOUT, JOHN E VA
    2005-04-22 → cancelled 2017-07-19
  • Sult, Donald B SC
    2023-03-31 active
← Back to W4RBX License history →