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

W4UKB callsign genealogy

Currently held by PETRASEK, THOMAS F

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 W4UKB's current licensee, walking backwards.

  1. KV4MXcancelled· E
    NOWLEN, MICHAEL JFLgranted 2016-08-02cancelled 2020-09-19
  2. WB4UKBcancelled· E
    NOWLEN, MICHAEL JFLgranted 2006-07-08cancelled 2013-04-26

Successor callsigns

Callsigns held now by people who previously held W4UKB.

No current licensee on record previously held this callsign.

All historical holders

Every license row we've seen with the callsign W4UKB, oldest first.

  • PETRASEK, THOMAS F GA
    2006-05-18 → cancelled 2018-07-25
  • NOWLEN, MICHAEL J FL
    2020-09-19 active
← Back to W4UKB License history →