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Confidence: Medium · Source: FCC ULS · As of 2026-09-12

K4MHZ callsign genealogy

Currently held by DZUBAN, MARK L

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 K4MHZ's current licensee, walking backwards.

  1. K4WGHcancelled· T
    HOBBS, CHRISTOPHER LKYgranted 2013-08-24cancelled 2022-01-05
  2. K4WHGcancelled· T
    HOBBS, CHRISTOPHER LKYgranted 2012-02-24cancelled 2013-08-24
  3. KG4CZAcancelled· T
    HOBBS, CHRISTOPHER LKYgranted 2009-03-04cancelled 2012-02-24

Successor callsigns

Callsigns held now by people who previously held K4MHZ.

  1. K2LBIactive· A
    DZUBAN, MARK LNJgranted 2019-05-21

All historical holders

Every license row we've seen with the callsign K4MHZ, oldest first.

  • DZUBAN, MARK L PA
    2011-03-15 → cancelled 2019-05-21
  • HOBBS, CHRISTOPHER L KY
    2022-01-05 active
← Back to K4MHZ License history →