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

KN0O callsign genealogy

Currently held by MASON, GUY 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 KN0O's current licensee, walking backwards.

  1. AC1SCcancelled· E
    MASON, GUY AMEgranted 2022-11-08cancelled 2024-06-22
  2. AC1SAcancelled· E
    MASON, GUY AMEgranted 2022-11-08cancelled 2024-06-04
  3. KD0RJRcancelled· E
    MASON, GUY AMEgranted 2022-11-08cancelled 2024-05-31

Successor callsigns

Callsigns held now by people who previously held KN0O.

  1. ND0Acancelled· E
    Williams, Lawrence HTNgranted 2009-07-17cancelled 2010-07-09

All historical holders

Every license row we've seen with the callsign KN0O, oldest first.

  • HANSEN, H LYNN IA
    1988-10-18 → cancelled 2000-10-19
  • Williams, Lawrence H TN
    2005-07-23 → cancelled 2009-07-17
  • Hansen, Lynn OK
    2012-05-22 → cancelled 2024-05-23
  • MASON, GUY A ME
    2024-06-22 active
← Back to KN0O License history →