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

K9WTH callsign genealogy

Currently held by BUCHANAN, MARK A

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 K9WTH's current licensee, walking backwards.

  1. KK9BCcancelled· E
    BUCHANAN, MARK AINgranted 2019-07-16cancelled 2021-12-03
  2. K9NRJcancelled· E
    BUCHANAN, MARK AINgranted 2019-03-22cancelled 2019-07-16

Successor callsigns

Callsigns held now by people who previously held K9WTH.

  1. NQ9Tcancelled· E
    BUCHANAN, MARK AINgranted 2022-04-05cancelled 2023-05-13
  2. K9NRJcancelled· E
    BUCHANAN, MARK AINgranted 2019-03-22cancelled 2019-07-16
  3. K9NRJcancelled· E
    BUCHANAN, MARK AINgranted 2017-07-04cancelled 2018-12-27
  4. WC9Dcancelled· E
    BUCHANAN, MARK AINgranted 2016-05-28cancelled 2016-10-18
  5. WC9Dcancelled· E
    BUCHANAN, MARK AINgranted 2015-06-06cancelled 2015-08-07
  6. WB9MABcancelled· E
    BUCHANAN, MARK AINgranted 2014-08-08cancelled 2014-09-13
  7. KJ9Qcancelled· E
    BUCHANAN, MARK AINgranted 2013-01-08cancelled 2013-05-17

All historical holders

Every license row we've seen with the callsign K9WTH, oldest first.

  • BUCHANAN, MARK A IN
    2012-09-25 → cancelled 2013-01-08
  • BUCHANAN, MARK A IN
    2013-05-17 → cancelled 2014-08-08
  • BUCHANAN, MARK A IN
    2014-09-13 → cancelled 2015-06-06
  • BUCHANAN, MARK A IN
    2015-08-07 → cancelled 2016-05-28
  • BUCHANAN, MARK A IN
    2016-10-18 → cancelled 2017-07-04
  • BUCHANAN, MARK A IN
    2018-12-27 → cancelled 2019-03-22
  • BUCHANAN, MARK A IN
    2021-12-03 → cancelled 2022-04-05
← Back to K9WTH License history →