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

WU0J callsign genealogy

Currently held by BARTHULY, RICHARD H

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 WU0J's current licensee, walking backwards.

  1. KC4VEcancelled· E
    Polo, JamesFLgranted 2019-11-16cancelled 2023-05-06
  2. KN4YGQcancelled· E
    Polo, JamesFLgranted 2019-09-17cancelled 2019-11-16

Successor callsigns

Callsigns held now by people who previously held WU0J.

  1. K4PYcancelled· E
    DE CASTRO, JUANCOgranted 2021-03-09cancelled 2021-09-21

All historical holders

Every license row we've seen with the callsign WU0J, oldest first.

  • BARTHULY, RICHARD H CO
    2008-10-23 → cancelled 2021-01-21
  • DE CASTRO, JUAN CO
    2021-02-12 → cancelled 2021-03-09
  • Polo, James KS
    2023-05-06 active
← Back to WU0J License history →