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

K4IGY callsign genealogy

Currently held by Robertson, Matthew G

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 K4IGY's current licensee, walking backwards.

  1. W7MGRcancelled· G
    Robertson, Matthew GNCgranted 2022-12-09cancelled 2024-06-21
  2. KS4ALTcancelled· G
    Robertson, Matthew GNCgranted 2022-04-05cancelled 2022-12-09
  3. W8MGRcancelled· G
    Robertson, Matthew GOHgranted 2021-09-04cancelled 2022-04-05

Successor callsigns

Callsigns held now by people who previously held K4IGY.

  1. KK4YYFcancelled· G
    Robertson, Matthew GNCgranted 2013-04-16cancelled 2014-05-02
← Back to K4IGY License history →