uls-tracker
Sign in
Confidence: Medium · Source: FCC ULS · As of 2026-09-15

WB9YPJ callsign genealogy

Currently held by Koszyk, Stephen A

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 WB9YPJ's current licensee, walking backwards.

  1. KF8AZMcancelled· G
    Koszyk, Stephen AMIgranted 2024-03-06cancelled 2026-09-09
  2. KF8AJOcancelled· G
    Koszyk, Stephen AMIgranted 2024-03-06cancelled 2024-04-22

Successor callsigns

Callsigns held now by people who previously held WB9YPJ.

No current licensee on record previously held this callsign.

All historical holders

Every license row we've seen with the callsign WB9YPJ, oldest first.

  • KOSZYK, STEPHEN A IN
    2006-10-05 → cancelled 2018-12-28
  • Koszyk, Stephen A MI
    2026-09-09 active
← Back to WB9YPJ License history →