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

W7XK callsign genealogy

Currently held by The Carroll Dean Jensen Memorial (Mariposa)

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 W7XK's current licensee, walking backwards.

  1. WF7LSUcancelled· E
    MERCER JR, JOHN WWYgranted 2009-05-27cancelled 2010-12-03
  2. KF7BZZcancelled· T
    MERCER JR, JOHN WWYgranted 2009-04-23cancelled 2009-05-27

Successor callsigns

Callsigns held now by people who previously held W7XK.

  1. K6CDJactive
    The Carroll Dean Jensen MemorialCAgranted 2018-08-24
  2. W7BWcancelled· E
    RAND, PHILLIP AORgranted 2006-08-08cancelled 2011-05-19

All historical holders

Every license row we've seen with the callsign W7XK, oldest first.

  • The Carroll Dean Jensen Memorial (Mariposa) CA
    2008-10-16 → cancelled 2008-11-14
  • MERCER JR, JOHN W CO
    2020-11-13 active
← Back to W7XK License history →