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

W4DSC callsign genealogy

Currently held by SCHAFER, FREDERICK R

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 W4DSC's current licensee, walking backwards.

  1. N4RMAcancelled· T
    SCHAFER, FREDERICK RSCgranted 2023-11-15cancelled 2026-01-21
  2. KK4UIBcancelled· T
    SCHAFER, FREDERICK RSCgranted 2013-10-17cancelled 2013-12-24

Successor callsigns

Callsigns held now by people who previously held W4DSC.

  1. NX4Iactive· E
    COX, DAVID SALgranted 2020-04-03

All historical holders

Every license row we've seen with the callsign W4DSC, oldest first.

  • COX, DAVID S AL
    2012-02-13 → cancelled 2020-04-03
  • SCHAFER, FREDERICK R SC
    2026-01-21 active
← Back to W4DSC License history →