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

K9BOO callsign genealogy

Currently held by Anderson, Mark

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 K9BOO's current licensee, walking backwards.

  1. K9NNNactive· G
    Finkelstein, Ethan SWIgranted 2022-03-15
  2. KJ7BCUcancelled· G
    Finkelstein, Ethan SWIgranted 2018-10-16cancelled 2022-03-15

Successor callsigns

Callsigns held now by people who previously held K9BOO.

  1. WT0Ecancelled· E
    Anderson, MarkILgranted 2016-10-18cancelled 2017-05-23

All historical holders

Every license row we've seen with the callsign K9BOO, oldest first.

  • Anderson, Mark IL
    2014-10-15 → cancelled 2016-10-18
  • Morgan, Donald F MI
    2019-05-29 active
← Back to K9BOO License history →