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

K5MST callsign genealogy

Currently held by Tomasofsky, Michael S

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 K5MST's current licensee, walking backwards.

  1. WV5MTcancelled· E
    Tomasofsky, Michael STXgranted 2018-07-20cancelled 2025-03-14
  2. AF5THcancelled· E
    Tomasofsky, Michael STXgranted 2014-09-17cancelled 2018-07-20

Successor callsigns

Callsigns held now by people who previously held K5MST.

  1. WW5Kcancelled· E
    COLLIER SR, BRUCE HLAgranted 2011-02-07cancelled 2020-04-13
← Back to K5MST License history →