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

NS0O callsign genealogy

Currently held by Johnson, Donald L

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 NS0O's current licensee, walking backwards.

  1. W0WNDcancelled· E
    Johnson, Donald LIAgranted 2020-06-27cancelled 2023-04-29
  2. KF0AIZcancelled· G
    Johnson, Donald LKSgranted 2020-06-01cancelled 2020-06-27

Successor callsigns

Callsigns held now by people who previously held NS0O.

  1. W7CPMactive· E
    MORRIS, CHESTER PAZgranted 2020-07-03

All historical holders

Every license row we've seen with the callsign NS0O, oldest first.

  • MORRIS, CHESTER P AZ
    2012-02-14 → cancelled 2020-07-03
  • Johnson, Donald L IA
    2023-04-29 active
← Back to NS0O License history →