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

KT4J callsign genealogy

Currently held by BRYAN JR, JAMES V

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 KT4J's current licensee, walking backwards.

  1. AK4OUcancelled· E
    BRYAN JR, JAMES VGAgranted 2011-09-20cancelled 2012-02-18
  2. KK4EHIcancelled· E
    BRYAN JR, JAMES VGAgranted 2011-09-20cancelled 2011-11-30

Successor callsigns

Callsigns held now by people who previously held KT4J.

  1. AJ4Mcancelled· E
    ROLL, FREDERICK JFLgranted 2010-01-30cancelled 2010-07-09
  2. WA4FRcancelled· E
    Roll, Frederick JFLgranted 2009-09-18cancelled 2009-12-19
  3. AA4FRcancelled· E
    Roll, Frederick JFLgranted 2007-06-26cancelled 2008-08-12

All historical holders

Every license row we've seen with the callsign KT4J, oldest first.

  • RAINBOW JR, GEORGE W TX
    1998-06-11 → cancelled 2006-06-20
  • ROLL, FREDERICK J FL
    2006-08-01 → cancelled 2007-06-26
  • Roll, Frederick J FL
    2008-08-12 → cancelled 2009-09-18
  • ROLL, FREDERICK J FL
    2009-12-19 → cancelled 2010-01-30
  • BRYAN JR, JAMES V GA
    2021-12-29 active
← Back to KT4J License history →