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

KQ0O callsign genealogy

Currently held by Terwilliger, William C

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 KQ0O's current licensee, walking backwards.

  1. AE0SYcancelled· E
    Sullivan, Edward GMNgranted 2015-01-27cancelled 2023-01-31
  2. KC0UGDcancelled· E
    Sullivan, Edward GMNgranted 2015-01-27cancelled 2022-12-16

Successor callsigns

Callsigns held now by people who previously held KQ0O.

  1. AC1JPcancelled· E
    DEFRA, LAGROMISCTgranted 2019-06-18cancelled 2020-07-31

All historical holders

Every license row we've seen with the callsign KQ0O, oldest first.

  • Terwilliger, William C ID
    2007-03-13 → cancelled 2019-03-14
  • DEFRA, LAGROMIS CT
    2019-06-18 → cancelled 2020-07-10
  • Sullivan, Edward G MN
    2023-01-31 active
← Back to KQ0O License history →