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

KT0X callsign genealogy

Currently held by ROY, WILLIAM S

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 KT0X's current licensee, walking backwards.

  1. KT0XXcancelled· E
    ROY, WILLIAM SCOgranted 2009-06-26cancelled 2010-02-27
  2. KD1NLcancelled· E
    ROY, WILLIAM SCOgranted 2002-12-12cancelled 2009-06-26
  3. N1KJH
    no FCC ULS record on file

Successor callsigns

Callsigns held now by people who previously held KT0X.

No current licensee on record previously held this callsign.

All historical holders

Every license row we've seen with the callsign KT0X, oldest first.

  • PENNER, WALTER MN
    1997-11-24 → cancelled 2009-11-25
  • ROY, WILLIAM S MA
    2019-12-03 active
← Back to KT0X License history →