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

AD4UM callsign genealogy

Currently held by Riggs, Joe W

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 AD4UM's current licensee, walking backwards.

  1. KR4PKactive
    District Seven Advisory Council Digital Radio ClubVAgranted 2016-02-17
  2. KI4LINcancelled
    District Seven Advisory Council Digital Radio ClubVAgranted 2005-08-11cancelled 2006-02-04

Successor callsigns

Callsigns held now by people who previously held AD4UM.

No current licensee on record previously held this callsign.

← Back to AD4UM License history →