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

K0SW callsign genealogy

Currently held by PIONEER AMATEUR RADIO CLUB

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 K0SW's current licensee, walking backwards.

  1. K0JFNcancelled
    PIONEER AMATEUR RADIO CLUBNEgranted 2016-06-04cancelled 2019-08-06
  2. W0RCHactive· G
    Simmion, RichardCOgranted 2017-04-07
  3. KD7DHCcancelled· G
    Simmion, RichardCOgranted 1998-11-19cancelled 2007-04-10

Successor callsigns

Callsigns held now by people who previously held K0SW.

No current licensee on record previously held this callsign.

All historical holders

Every license row we've seen with the callsign K0SW, oldest first.

  • Martens, Larry D NE
    2016-12-08 → cancelled 2019-04-30
  • PIONEER AMATEUR RADIO CLUB NE
    2019-08-06 active
← Back to K0SW License history →