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

KO5A callsign genealogy

Currently held by RAPP, TERRY L

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 KO5A's current licensee, walking backwards.

  1. KO5SAcancelled· E
    KOSA, ROBERT ATXgranted 2000-02-29cancelled 2009-01-16
  2. N5LCOcancelled· A
    KOSA, ROBERT ATXgranted 1993-03-02cancelled 2000-02-29
  3. KB5DFY
    no FCC ULS record on file

Successor callsigns

Callsigns held now by people who previously held KO5A.

No current licensee on record previously held this callsign.

All historical holders

Every license row we've seen with the callsign KO5A, oldest first.

  • RAPP, TERRY L TN
    2006-09-02 → cancelled 2006-12-27
  • KOSA, ROBERT A TX
    2018-10-27 active
← Back to KO5A License history →