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

K4RB callsign genealogy

Currently held by BLUMBERG, ROBERT G

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 K4RB's current licensee, walking backwards.

  1. AA4Uactive· E
    CARROLL, STEPHEN JALgranted 2017-07-11
  2. K2SCactive· E
    Ishikawa, TakayukiORgranted 2021-12-07
  3. AE7QEcancelled· E
    Ishikawa, TakayukiORgranted 2011-09-16cancelled 2011-12-30
  4. KF7RPNcancelled· E
    Ishikawa, TakayukiORgranted 2011-09-16cancelled 2011-12-09

Successor callsigns

Callsigns held now by people who previously held K4RB.

No current licensee on record previously held this callsign.

← Back to K4RB License history →