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

WD4GPS callsign genealogy

Currently held by WHITE III, JOHN 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 WD4GPS's current licensee, walking backwards.

  1. KK4GPScancelled· E
    McMahon, Patrick LTNgranted 2018-05-05cancelled 2019-11-22
  2. KX4KKcancelled· E
    McMahon, Patrick LTNgranted 2015-03-17cancelled 2018-05-05

Successor callsigns

Callsigns held now by people who previously held WD4GPS.

  1. K4LBGactive· G
    WHITE III, JOHN DVAgranted 2021-01-20

All historical holders

Every license row we've seen with the callsign WD4GPS, oldest first.

  • WHITE III, JOHN D VA
    2007-10-25 → cancelled 2011-01-19
  • McMahon, Patrick L TN
    2019-11-22 active
← Back to WD4GPS License history →