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

WB1CDB callsign genealogy

Currently held by DZIUBA, MICHAEL J

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 WB1CDB's current licensee, walking backwards.

  1. K4MJDcancelled· G
    DZIUBA, MICHAEL JTNgranted 2021-09-11cancelled 2025-06-27
  2. KE4MJDcancelled· G
    DZIUBA, MICHAEL JTNgranted 2020-09-18cancelled 2021-09-11
  3. KB4WTFactive· G
    Cararo, SalvatoreFLgranted 2022-11-04
  4. KQ4DRQcancelled· T
    Cararo, SalvatoreFLgranted 2022-10-12cancelled 2022-11-04

Successor callsigns

Callsigns held now by people who previously held WB1CDB.

No current licensee on record previously held this callsign.

← Back to WB1CDB License history →