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

N8MSU callsign genealogy

Currently held by GRUBER, JOHN S

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 N8MSU's current licensee, walking backwards.

  1. KB8KHJ
    no FCC ULS record on file

Successor callsigns

Callsigns held now by people who previously held N8MSU.

No current licensee on record previously held this callsign.

← Back to N8MSU License history →