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Confidence: Medium · Source: FCC ULS · As of 2026-09-14

KJ5SK callsign genealogy

Currently held by ACOSTA, JOHN 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 KJ5SK's current licensee, walking backwards.

  1. KC5AIW
    no FCC ULS record on file

Successor callsigns

Callsigns held now by people who previously held KJ5SK.

  1. KB5ACactive· A
    ACOSTA, JOHN ATXgranted 2018-10-06
← Back to KJ5SK License history →