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

W9MHZ callsign genealogy

Currently held by PFEIFER, MICHAEL L

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 W9MHZ's current licensee, walking backwards.

  1. KC9ZJDcancelled· G
    PFEIFER, MICHAEL LILgranted 2006-07-28cancelled 2013-08-23
  2. KB9ONNcancelled· G
    PFEIFER, MICHAEL LILgranted 2006-07-28cancelled 2013-07-23

Successor callsigns

Callsigns held now by people who previously held W9MHZ.

  1. W3AFPcancelled· E
    PENGELLY, AARON FPAgranted 2009-07-11cancelled 2011-04-26

All historical holders

Every license row we've seen with the callsign W9MHZ, oldest first.

  • BOWEN, WILLIAM D IN
    1996-09-24 → cancelled 2008-09-25
  • PENGELLY, AARON F PA
    2009-04-03 → cancelled 2009-07-11
  • PFEIFER, MICHAEL L FL
    2023-08-23 active
← Back to W9MHZ License history →