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

W7OS callsign genealogy

Currently held by DOCTOR CLIFFORD J SPIKE MEMORIAL MUSEUM

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 W7OS's current licensee, walking backwards.

  1. KC7KDM
    no FCC ULS record on file

Successor callsigns

Callsigns held now by people who previously held W7OS.

No current licensee on record previously held this callsign.

← Back to W7OS License history →