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Confidence: Medium · Source: FCC ULS · As of 2026-09-14

KK3KKK callsign genealogy

Currently held by SHILLING, HAROLD T

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 KK3KKK's current licensee, walking backwards.

  1. KK4JJVcancelled· T
    SHILLING, HAROLD TVAgranted 2012-05-18cancelled 2012-11-10
  2. K4OPSactive· G
    Costanzo, Louis JVAgranted 2019-08-20
  3. KN4VYRcancelled· T
    Costanzo, Louis JVAgranted 2019-07-25cancelled 2019-08-20

Successor callsigns

Callsigns held now by people who previously held KK3KKK.

  1. KF4KMDexpired· T
    SHILLING, HAROLD TFLgranted 2013-12-04cancelled 2026-03-07
← Back to KK3KKK License history →