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

N9JOF callsign genealogy

Currently held by Post, Frederick 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 N9JOF's current licensee, walking backwards.

  1. KG5MPDcancelled· G
    O'FLYNN, JAMES WMSgranted 2016-03-30cancelled 2016-09-24

Successor callsigns

Callsigns held now by people who previously held N9JOF.

  1. W5JOFactive· E
    O'FLYNN, JAMES WMSgranted 2024-07-26
  2. K9RRRexpired· G
    Post, Frederick AALgranted 2011-01-13cancelled 2023-03-17

All historical holders

Every license row we've seen with the callsign N9JOF, oldest first.

  • Post, Frederick A MO
    2001-01-25 → cancelled 2001-03-16
  • O'FLYNN, JAMES W MS
    2016-09-24 → cancelled 2024-07-26
← Back to N9JOF License history →