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

AI4FS callsign genealogy

Currently held by Marlowe, Jeremy N

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 AI4FS's current licensee, walking backwards.

  1. N4CPTactive· E
    DINGFELDER JR, ROBERTFLgranted 2020-04-06
  2. KJ4RQKcancelled· E
    DINGFELDER JR, ROBERTFLgranted 2010-01-15cancelled 2010-04-09

Successor callsigns

Callsigns held now by people who previously held AI4FS.

  1. N4NIactive· E
    Marlowe, Jeremy NVAgranted 2016-10-12
← Back to AI4FS License history →