uls-tracker
Sign in
Confidence: Medium · Source: FCC ULS · As of 2026-09-12

NW9R callsign genealogy

Currently held by Gromczynski, Wojciech

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 NW9R's current licensee, walking backwards.

  1. AD1XBcancelled· E
    Gromczynski, WojciechWAgranted 2017-10-28cancelled 2017-11-28
  2. KI7QAWcancelled· E
    Gromczynski, WojciechWAgranted 2017-09-25cancelled 2017-10-28

Successor callsigns

Callsigns held now by people who previously held NW9R.

  1. W7KRXcancelled· E
    Hays, Christopher BTXgranted 2015-11-07cancelled 2015-12-26
  2. NA9Rcancelled· E
    Hays, Christopher BTXgranted 2013-08-30cancelled 2014-01-31

All historical holders

Every license row we've seen with the callsign NW9R, oldest first.

  • WALKER JR, SETH MI
    2000-04-28 → cancelled 2012-07-25
  • Hays, Christopher B TX
    2013-02-01 → cancelled 2013-08-30
  • Hays, Christopher B TX
    2015-07-28 → cancelled 2015-11-07
  • Gromczynski, Wojciech WA
    2017-11-28 active
← Back to NW9R License history →