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

K9RMS callsign genealogy

Currently held by Shoemaker, Ryan M

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 K9RMS's current licensee, walking backwards.

  1. KC9YSQcancelled· T
    Shoemaker, Ryan MINgranted 2013-04-15cancelled 2013-05-04

Successor callsigns

Callsigns held now by people who previously held K9RMS.

  1. K9RMactive· E
    ARVO, CHARLES JINgranted 2026-05-20

All historical holders

Every license row we've seen with the callsign K9RMS, oldest first.

  • ARVO, CHARLES J IN
    1998-08-11 → cancelled 2006-06-24
  • Shoemaker, Ryan M IN
    2023-02-23 active
← Back to K9RMS License history →