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

KM5YU callsign genealogy

Currently held by ROWEKAMP, WILLIAM J

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 KM5YU's current licensee, walking backwards.

  1. KI0RJcancelled· A
    ROWEKAMP, WILLIAM JTXgranted 2000-01-04cancelled 2007-01-30
  2. KB0UWcancelled· A
    ROWEKAMP, WILLIAM JMOgranted 1989-08-01cancelled 2000-01-04

Successor callsigns

Callsigns held now by people who previously held KM5YU.

  1. KK7ZOcancelled· A
    ROWEKAMP, WILLIAM JMOgranted 2019-12-14cancelled 2022-01-07
← Back to KM5YU License history →