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

KB4SM callsign genealogy

Currently held by HALE, BENJAMIN S

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 KB4SM's current licensee, walking backwards.

  1. K4BBRactive· G
    Smith, Boyce RAZgranted 2026-08-11
  2. KM4QARcancelled· T
    Smith, Boyce RALgranted 2015-12-30cancelled 2016-10-29

Successor callsigns

Callsigns held now by people who previously held KB4SM.

  1. KB1SMactive· A
    bostock, roger wMAgranted 2020-07-17

All historical holders

Every license row we've seen with the callsign KB4SM, oldest first.

  • HALE, BENJAMIN S AR
    1994-07-15 → cancelled 2006-07-18
  • BOSTOCK, ROGER W MA
    2013-10-17 → cancelled 2020-07-17
← Back to KB4SM License history →