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

KC0CO callsign genealogy

Currently held by WILLIAMSON, MAURICE E

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 KC0CO's current licensee, walking backwards.

  1. AJ6KKcancelled· E
    CALLAHAN, CONOR ACOgranted 2017-10-24cancelled 2021-03-27
  2. KB3ONCcancelled· E
    CALLAHAN, CONOR ACAgranted 2017-10-24cancelled 2019-07-09

Successor callsigns

Callsigns held now by people who previously held KC0CO.

No current licensee on record previously held this callsign.

All historical holders

Every license row we've seen with the callsign KC0CO, oldest first.

  • WILLIAMSON, MAURICE E MS
    2007-02-06 → cancelled 2019-02-12
  • CALLAHAN, CONOR A CO
    2021-03-27 active
← Back to KC0CO License history →