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

K4OO callsign genealogy

Currently held by SMITH CHART AMATEUR RADIO SOCIETY

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 K4OO's current licensee, walking backwards.

  1. K4SCSactive
    ST CATHERINE OF SIENA AMATEUR RADIO CLUBFLgranted 2015-04-08
  2. KI4KBPcancelled
    ST CATHERINE OF SIENA AMATEUR RADIO CLUBFLgranted 2005-05-06cancelled 2005-06-04

Successor callsigns

Callsigns held now by people who previously held K4OO.

No current licensee on record previously held this callsign.

All historical holders

Every license row we've seen with the callsign K4OO, oldest first.

  • OSTROM, HERBERT N NC
    1994-03-22 → cancelled 1999-05-13
  • SMITH CHART AMATEUR RADIO SOCIETY NC
    2021-03-12 active
← Back to K4OO License history →