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

W7TO callsign genealogy

Currently held by BARTH, DENNIS R

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 W7TO's current licensee, walking backwards.

  1. KD7NOEcancelled· E
    Boyd, Thomas AAZgranted 2001-06-12cancelled 2001-08-25

Successor callsigns

Callsigns held now by people who previously held W7TO.

  1. W7UAactive· E
    BACON, PATRICK NNVgranted 2018-02-13

All historical holders

Every license row we've seen with the callsign W7TO, oldest first.

  • BARTH, DENNIS R OR
    1999-02-26 → cancelled 1999-08-06
  • Boyd III, Thomas A AZ
    2021-09-21 active
← Back to W7TO License history →