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

K7WTF callsign genealogy

Currently held by Carlson, Joseph A

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 K7WTF's current licensee, walking backwards.

  1. N7WRXactive· G
    Nielsen, Karl ACOgranted 2024-06-29
  2. KC0NPQcancelled· G
    Nielsen, Karl ACOgranted 2012-04-27cancelled 2014-05-16

Successor callsigns

Callsigns held now by people who previously held K7WTF.

  1. N7WRXcancelled· T
    Carlson, Joseph AWAgranted 2009-04-14cancelled 2011-03-08

All historical holders

Every license row we've seen with the callsign K7WTF, oldest first.

  • Carlson, Joseph A WA
    2004-06-02 → cancelled 2009-04-14
  • Carlson, Joseph A WA
    2021-03-10 active
← Back to K7WTF License history →