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

WB9SWP callsign genealogy

Currently held by SCHWALENBERG, MARK L

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 WB9SWP's current licensee, walking backwards.

  1. KF0GIcancelled· A
    SCHWALENBERG, MARK LWIgranted 2011-11-23cancelled 2021-01-23
  2. KC3RHcancelled· A
    HOLLOWAY JR, WALTER Rcancelled 1998-09-10

Successor callsigns

Callsigns held now by people who previously held WB9SWP.

No current licensee on record previously held this callsign.

← Back to WB9SWP License history →