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

WA9SLZ callsign genealogy

Currently held by GERICKE, TIMOTHY 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 WA9SLZ's current licensee, walking backwards.

  1. KC9PUCcancelled· G
    Gaddo, John CWIgranted 2008-04-30cancelled 2009-09-29
  2. KC9NOFcancelled· G
    Gaddo, John CWIgranted 2008-04-30cancelled 2009-05-12

Successor callsigns

Callsigns held now by people who previously held WA9SLZ.

No current licensee on record previously held this callsign.

All historical holders

Every license row we've seen with the callsign WA9SLZ, oldest first.

  • GERICKE, TIMOTHY F WI
    1998-12-30 → cancelled 2007-06-06
  • Gaddo, John C MN
    2019-08-08 active
← Back to WA9SLZ License history →