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

KB3T callsign genealogy

Currently held by Trageser, John O

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 KB3T's current licensee, walking backwards.

  1. KC3SRWcancelled· E
    Trageser, John OMDgranted 2021-09-13cancelled 2022-05-10

Successor callsigns

Callsigns held now by people who previously held KB3T.

  1. N3AJactive· E
    STUART V, WILLIAM MMDgranted 2020-04-21
  2. NX2Ycancelled· E
    HUMPHREY, JEROME HPAgranted 2010-11-28cancelled 2011-12-16

All historical holders

Every license row we've seen with the callsign KB3T, oldest first.

  • HUMPHREY, JEROME H PA
    2005-10-26 → cancelled 2010-11-28
  • STUART V, WILLIAM M MD
    2012-12-27 → cancelled 2020-04-21
  • Trageser, John O MD
    2022-05-10 active
← Back to KB3T License history →