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

AI5U callsign genealogy

Currently held by STERNBERG, TIMOTHY M

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 AI5U's current licensee, walking backwards.

  1. KI5KREcancelled· E
    Schumaker, Robert PTXgranted 2020-08-26cancelled 2020-12-05
  2. KC1AFFcancelled· G
    Schumaker, Robert PTXgranted 2020-08-26cancelled 2020-08-27
  3. KD8OYNcancelled· G
    Schumaker, Robert PCTgranted 2010-11-03cancelled 2013-07-17

Successor callsigns

Callsigns held now by people who previously held AI5U.

  1. NG7Pactive· E
    STERNBERG, TIMOTHY MOKgranted 2018-11-16

All historical holders

Every license row we've seen with the callsign AI5U, oldest first.

  • STERNBERG, TIMOTHY M OK
    2008-11-26 → cancelled 2018-11-16
  • Schumaker, Robert P TX
    2020-12-05 active
← Back to AI5U License history →