uls-tracker
Sign in
Confidence: Medium · Source: FCC ULS · As of 2026-09-14

N1XOO callsign genealogy

Currently held by Gadbois Sr, James J

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 N1XOO's current licensee, walking backwards.

  1. K1CIEcancelled· E
    Ciejka, Michael AMAgranted 2016-08-09cancelled 2020-08-14
  2. KB1LWKcancelled· E
    Ciejka, Michael AMAgranted 2014-09-30cancelled 2016-08-09

Successor callsigns

Callsigns held now by people who previously held N1XOO.

No current licensee on record previously held this callsign.

All historical holders

Every license row we've seen with the callsign N1XOO, oldest first.

  • Gadbois Sr, James J MA
    2006-04-13 → cancelled 2018-06-20
  • Ciejka, Michael A MA
    2020-08-14 active