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

W7MCM callsign genealogy

Currently held by Mauk, Michael C

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 W7MCM's current licensee, walking backwards.

  1. KF7LGBcancelled· G
    Mauk, Michael CWAgranted 2010-07-02cancelled 2011-03-25

Successor callsigns

Callsigns held now by people who previously held W7MCM.

  1. W7CMXexpired· A
    JOHNSON, WILLIAM AWAgranted 2009-04-25cancelled 2021-04-22

All historical holders

Every license row we've seen with the callsign W7MCM, oldest first.

  • Mauk, Michael C WA
    2021-03-09 active
  • JOHNSON, WILLIAM A
    — → cancelled 1999-04-21
← Back to W7MCM License history →