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

WB4SFW callsign genealogy

Currently held by LAUX, JOSEPH P

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 WB4SFW's current licensee, walking backwards.

  1. WB7PLcancelled· A
    LAUX, JOSEPH PAZgranted 2014-04-18cancelled 2016-07-19
  2. WB5PLcancelled· E
    Lowman, Timothy BMSgranted 2023-12-12cancelled 2025-08-29
  3. KJ5BCYcancelled· E
    Lowman, Timothy BMSgranted 2023-05-19cancelled 2023-12-12

Successor callsigns

Callsigns held now by people who previously held WB4SFW.

  1. WB5PLcancelled· A
    LAUX, JOSEPH PAZgranted 2010-02-06cancelled 2014-04-18

All historical holders

Every license row we've seen with the callsign WB4SFW, oldest first.

  • LAUX, JOSEPH P NM
    2006-03-30 → cancelled 2010-02-06
  • LAUX, JOSEPH P SC
    2016-07-19 active
← Back to WB4SFW License history →