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

KC7ZTC callsign genealogy

Currently held by SPALDING, WILLIAM 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 KC7ZTC's current licensee, walking backwards.

  1. K7CRRactive· G
    SPALDING, WILLIAM LOKgranted 2018-06-05

Successor callsigns

Callsigns held now by people who previously held KC7ZTC.

  1. K7CRRactive· G
    SPALDING, WILLIAM LOKgranted 2018-06-05
  2. K7CRRcancelled· G
    SPALDING, WILLIAM LORgranted 2009-03-20cancelled 2018-05-15

All historical holders

Every license row we've seen with the callsign KC7ZTC, oldest first.

  • SPALDING, WILLIAM L OR
    2007-11-27 → cancelled 2009-03-20
  • SPALDING, WILLIAM L OR
    2018-05-15 → cancelled 2018-06-05
← Back to KC7ZTC License history →