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

K7TMM callsign genealogy

Currently held by Schoof, Russell D

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 K7TMM's current licensee, walking backwards.

  1. KJ7SFEcancelled· E
    Mayden, Michael JIDgranted 2020-11-13cancelled 2021-08-03

Successor callsigns

Callsigns held now by people who previously held K7TMM.

  1. KC7MMactive· E
    Schoof, Russell DORgranted 2026-08-05

All historical holders

Every license row we've seen with the callsign K7TMM, oldest first.

  • MC GOWAN, TIMOTHY P WA
    2002-10-01 → cancelled 2014-10-02
  • Schoof, Russell D OR
    2016-08-09 → cancelled 2016-10-12
  • Mayden, Michael J ID
    2021-08-03 active
← Back to K7TMM License history →