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

K5YW callsign genealogy

Currently held by Lange, Mark 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 K5YW's current licensee, walking backwards.

  1. K6MDLactive· G
    Landau MD, Michael DCAgranted 2017-02-17
  2. KK6MDLcancelled· G
    Landau MD, Michael DCAgranted 2014-04-01cancelled 2017-02-17
  3. KG6FRLcancelled· G
    Landau, Michael DCAgranted 2011-04-09cancelled 2014-04-01

Successor callsigns

Callsigns held now by people who previously held K5YW.

  1. K8HHcancelled· E
    Watanabe, YukihiroMIgranted 2009-07-10cancelled 2017-10-17

All historical holders

Every license row we've seen with the callsign K5YW, oldest first.

  • SUITS, JOHN F TX
    1996-12-18 → cancelled 2008-12-19
  • Watanabe, Yukihiro MI
    2009-01-06 → cancelled 2009-07-10
  • Lange, Mark D TX
    2021-07-09 active
← Back to K5YW License history →