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

K3FUD callsign genealogy

Currently held by PROSTKO, DOUGLAS

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 K3FUD's current licensee, walking backwards.

  1. KC3UCPcancelled· G
    PROSTKO, DOUGLASPAgranted 2022-04-18cancelled 2022-05-28
  2. KC3UBKcancelled· G
    PROSTKO, DOUGLASPAgranted 2022-04-18cancelled 2022-05-09

Successor callsigns

Callsigns held now by people who previously held K3FUD.

  1. K3DEPactive· E
    PROSTKO, DOUGLASPAgranted 2022-08-20

All historical holders

Every license row we've seen with the callsign K3FUD, oldest first.

  • STORMER SR, ROBERT J PA
    1994-03-22 → cancelled 2006-03-23
  • PROSTKO, DOUGLAS PA
    2022-05-28 → cancelled 2022-08-20
← Back to K3FUD License history →