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Confidence: Medium · Source: FCC ULS · As of 2026-09-14

K9EI callsign genealogy

Currently held by Bonadies, Matthew 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 K9EI's current licensee, walking backwards.

  1. KB9YOJcancelled· E
    Bonadies, Matthew LINgranted 2020-12-08cancelled 2022-02-23

Successor callsigns

Callsigns held now by people who previously held K9EI.

  1. KJ5Zactive· E
    FRAZIER, MICHAEL VTXgranted 2020-02-01
  2. KR6ENactive· E
    GRUBBS III, JAMES WILgranted 2015-04-24

All historical holders

Every license row we've seen with the callsign K9EI, oldest first.

  • GRUBBS III, JAMES W IL
    2012-05-17 → cancelled 2015-04-24
  • FRAZIER, MICHAEL V TX
    2017-05-13 → cancelled 2020-02-01
  • Bonadies, Matthew L IN
    2022-02-23 active
← Back to K9EI License history →