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

W1THC callsign genealogy

Currently held by CAMPBELL, MARK 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 W1THC's current licensee, walking backwards.

  1. K9ODWcancelled· G
    CAMPBELL, MARK AILgranted 2021-01-09cancelled 2023-08-29
  2. N9KDWcancelled· G
    CAMPBELL, MARK AILgranted 2020-11-04cancelled 2021-01-09

Successor callsigns

Callsigns held now by people who previously held W1THC.

No current licensee on record previously held this callsign.

All historical holders

Every license row we've seen with the callsign W1THC, oldest first.

  • D OSTILIO, PHILLIP J CT
    2005-06-15 → cancelled 2017-09-12
  • CAMPBELL, MARK A IL
    2023-08-29 active
← Back to W1THC License history →