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

WB4BLI callsign genealogy

Currently held by Irwin, Billy L

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 WB4BLI's current licensee, walking backwards.

  1. KG4OYNcancelled· G
    Irwin, Billy LSCgranted 2000-12-08cancelled 2003-03-29
  2. KG4KSZcancelled· G
    Irwin, Billy LSCgranted 2000-12-08cancelled 2001-08-22

Successor callsigns

Callsigns held now by people who previously held WB4BLI.

  1. K9OHactive· E
    Irwin, Billy LSCgranted 2021-11-09
← Back to WB4BLI License history →