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

KJ4KJ callsign genealogy

Currently held by SPENCER, JAMES 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 KJ4KJ's current licensee, walking backwards.

  1. AK4AMactive· E
    KOWALCHUK, ALEX MGAgranted 2021-03-19
  2. W4KYWcancelled· E
    KOWALCHUK, ALEX MGAgranted 2018-11-27cancelled 2021-03-19
  3. KN4QDNcancelled· T
    KOWALCHUK, ALEX MGAgranted 2018-11-07cancelled 2018-11-27

Successor callsigns

Callsigns held now by people who previously held KJ4KJ.

  1. AK4AMcancelled· E
    SPENCER, JAMES EFLgranted 2005-03-21cancelled 2011-07-06

All historical holders

Every license row we've seen with the callsign KJ4KJ, oldest first.

  • SPENCER, JAMES E FL
    2005-03-21 → cancelled 2010-07-08
  • SPENCER, JAMES E FL
    2021-04-09 active
← Back to KJ4KJ License history →