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

W7CMX callsign genealogy

Currently held by JOHNSON, WILLIAM A

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 W7CMX's current licensee, walking backwards.

  1. W7MCMactive· E
    Mauk, Michael CWAgranted 2021-03-09
  2. KF7LGBcancelled· G
    Mauk, Michael CWAgranted 2010-07-02cancelled 2011-03-25

Successor callsigns

Callsigns held now by people who previously held W7CMX.

No current licensee on record previously held this callsign.

← Back to W7CMX License history →