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

AB5UM callsign genealogy

Currently held by GREEN, BRENT A

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 AB5UM's current licensee, walking backwards.

  1. KJ5VPactive· E
    POLEN JR, VERNON LTXgranted 2026-08-01
  2. KJ5QKMcancelled· E
    POLEN JR, VERNON LTXgranted 2023-03-28cancelled 2026-08-01
  3. N6ZSHcancelled· G
    POLEN JR, VERNON LTXgranted 2023-03-28cancelled 2026-06-15
  4. KC6LEL
    no FCC ULS record on file

Successor callsigns

Callsigns held now by people who previously held AB5UM.

No current licensee on record previously held this callsign.

← Back to AB5UM License history →