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

KC9REX callsign genealogy

Currently held by Mosier, James S

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 KC9REX's current licensee, walking backwards.

  1. W9SWMcancelled· T
    Salmon, William GWIgranted 2018-05-30cancelled 2021-09-11
  2. KD9GILcancelled· T
    Salmon, William GWIgranted 2016-05-23cancelled 2018-05-30

Successor callsigns

Callsigns held now by people who previously held KC9REX.

  1. W9SWMcancelled· G
    Mosier, James SINgranted 2010-02-02cancelled 2010-02-23

All historical holders

Every license row we've seen with the callsign KC9REX, oldest first.

  • Mosier, James S IN
    2010-01-12 → cancelled 2010-02-02
  • Mosier, James S IN
    2019-12-03 active
← Back to KC9REX License history →