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

W1DHS callsign genealogy

Currently held by Mammano, Philip T

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 W1DHS's current licensee, walking backwards.

  1. K4ESUactive· E
    Smith, David DSCgranted 2023-09-22
  2. KC2EMFcancelled· E
    Smith, David DTNgranted 2008-10-07cancelled 2013-12-17

Successor callsigns

Callsigns held now by people who previously held W1DHS.

No current licensee on record previously held this callsign.

← Back to W1DHS License history →