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

KK4GPS callsign genealogy

Currently held by McMahon, Patrick 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 KK4GPS's current licensee, walking backwards.

  1. KX4KKcancelled· E
    McMahon, Patrick LTNgranted 2015-03-17cancelled 2018-05-05

Successor callsigns

Callsigns held now by people who previously held KK4GPS.

  1. WD4GPSactive· E
    McMahon, Patrick LTNgranted 2019-11-22
  2. KX4KKcancelled· E
    McMahon, Patrick LTNgranted 2015-03-17cancelled 2018-05-05
  3. W4AKZcancelled· T
    McMahon, Patrick LTNgranted 2012-03-02cancelled 2015-03-17

All historical holders

Every license row we've seen with the callsign KK4GPS, oldest first.

  • McMahon, Patrick L TN
    2012-02-08 → cancelled 2012-03-02
  • McMahon, Patrick L TN
    2015-03-17 → cancelled 2018-04-16
  • McMahon, Patrick L TN
    2018-05-05 → cancelled 2019-11-22
← Back to KK4GPS License history →