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

W4OH callsign genealogy

Currently held by MATHISON, TIMOTHY D

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 W4OH's current licensee, walking backwards.

  1. AA4WHcancelled· E
    MATHISON, TIMOTHY DFLgranted 2021-02-17cancelled 2022-02-12
  2. W4EKPcancelled· E
    MATHISON, TIMOTHY DFLgranted 2020-08-28cancelled 2021-02-17
  3. KO4FXHcancelled· G
    MATHISON, TIMOTHY DFLgranted 2020-08-03cancelled 2020-08-28

Successor callsigns

Callsigns held now by people who previously held W4OH.

  1. NZ4Cactive· E
    SAMPSON, DARYL ENCgranted 2020-01-24

All historical holders

Every license row we've seen with the callsign W4OH, oldest first.

  • SAMPSON, DARYL E NC
    2018-05-10 → cancelled 2020-01-24
  • MATHISON, TIMOTHY D FL
    2022-02-12 active
← Back to W4OH License history →