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

W1MO callsign genealogy

Currently held by MC MASTER, JOHN E

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 W1MO's current licensee, walking backwards.

  1. ND4AAactive· E
    ACKER, J ANTHONYGAgranted 2018-04-24
  2. N4CNTcancelled· E
    ACKER, J ANTHONYGAgranted 2017-09-02cancelled 2018-04-24
  3. KN4FIAcancelled· T
    Acker, J AnthonyGAgranted 2017-08-15cancelled 2017-09-02

Successor callsigns

Callsigns held now by people who previously held W1MO.

No current licensee on record previously held this callsign.

All historical holders

Every license row we've seen with the callsign W1MO, oldest first.

  • MC MASTER, JOHN E MA
    1991-02-05 → cancelled 2003-02-06
  • DUXBURY, NORMAN R FL
    2023-03-25 active
← Back to W1MO License history →