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

WB4Z callsign genealogy

Currently held by Bass, William H

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 WB4Z's current licensee, walking backwards.

  1. WB4WBcancelled· E
    Bass, William HNCgranted 2021-02-09cancelled 2023-10-14
  2. K4TFactive· E
    Guthrie III, John TALgranted 2023-02-28
  3. AE4SIcancelled· E
    Guthrie III, John TALgranted 2020-10-06cancelled 2023-02-28
  4. KY4AScancelled· E
    Guthrie III, John TALgranted 2020-08-25cancelled 2020-10-06

Successor callsigns

Callsigns held now by people who previously held WB4Z.

  1. WB0Zcancelled· E
    HAMMOND, DARYL IFLgranted 2021-09-25cancelled 2022-09-24

All historical holders

Every license row we've seen with the callsign WB4Z, oldest first.

  • GRANSTAFF, WILLIAM F KY
    2004-02-26 → cancelled 2016-05-25
  • HAMMOND, DARYL I FL
    2016-06-14 → cancelled 2021-09-25
  • Bass, William H NC
    2023-10-14 active
← Back to WB4Z License history →