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

K4ACO callsign genealogy

Currently held by Calloway Jr, David 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 K4ACO's current licensee, walking backwards.

  1. KO4AJPcancelled· T
    Jolley, Stephen EFLgranted 2019-12-03cancelled 2019-12-31

Successor callsigns

Callsigns held now by people who previously held K4ACO.

  1. W4XCOactive· G
    Jolley, Stephen EFLgranted 2020-03-10
  2. KM4UZTcancelled· T
    Calloway Jr, David LNCgranted 2016-03-15cancelled 2016-07-29

All historical holders

Every license row we've seen with the callsign K4ACO, oldest first.

  • Rosemore, Fredric M FL
    2001-09-22 → cancelled 2013-10-16
  • Calloway Jr, David L NC
    2016-03-15 → cancelled 2016-07-06
  • Jolley, Stephen E FL
    2019-12-31 → cancelled 2020-03-10
← Back to K4ACO License history →