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

K2IO callsign genealogy

Currently held by AMRHEIN SR, RONALD A

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 K2IO's current licensee, walking backwards.

  1. NU2Kactive· E
    Daniele, JohnNYgranted 2023-12-01
  2. K2ADVactive· E
    Mcclendon, Richard LWAgranted 2023-01-10
  3. WA7ADVcancelled· G
    Mcclendon, Richard LWAgranted 2018-08-11cancelled 2023-01-10
  4. KI7JSFcancelled· G
    Mcclendon, Richard LWAgranted 2017-01-23cancelled 2018-08-11

Successor callsigns

Callsigns held now by people who previously held K2IO.

  1. AH6SXcancelled· E
    AMRHEIN SR, RONALD AHIgranted 2007-01-17cancelled 2010-07-13

All historical holders

Every license row we've seen with the callsign K2IO, oldest first.

  • AMRHEIN SR, RONALD A HI
    2007-01-17 → cancelled 2009-07-22
  • Yamamoto, Takeshi NY
    2021-05-15 active
← Back to K2IO License history →