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

K0SO callsign genealogy

Currently held by FARRELL, BRADLEY 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 K0SO's current licensee, walking backwards.

  1. K0YQactive· E
    Grimm, John RCOgranted 2023-10-24
  2. KC0MQYcancelled· E
    Grimm Ii, John RCOgranted 2002-03-18cancelled 2004-01-16

Successor callsigns

Callsigns held now by people who previously held K0SO.

  1. W3LWcancelled· E
    FARRELL, BRADLEY APAgranted 1999-09-22cancelled 1999-12-24

All historical holders

Every license row we've seen with the callsign K0SO, oldest first.

  • FARRELL, BRADLEY A PA
    1999-02-10 → cancelled 1999-09-22
  • INGHAM, BRUCE A IA
    2021-08-10 active
← Back to K0SO License history →