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

AC4IR callsign genealogy

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 AC4IR's current licensee, walking backwards.

  1. K4DSMactive· E
    Mantooth, Daniel STNgranted 2025-09-16
  2. KX4CHcancelled· E
    Mantooth, Daniel STNgranted 2017-03-08cancelled 2025-09-16
  3. KN4BPBcancelled· E
    Mantooth, Daniel STNgranted 2017-03-08cancelled 2017-04-10

Successor callsigns

Callsigns held now by people who previously held AC4IR.

  1. WX0Factive· E
    MC COY, DAVID SNCgranted 2021-10-26
  2. AC7AMactive· E
    BUTLER, THOMAS AAZgranted 2018-12-28

All historical holders

Every license row we've seen with the callsign AC4IR, oldest first.

  • MC COY, DAVID S NC
    2012-06-09 → cancelled 2021-10-26
  • —
    — → cancelled 1999-02-10
← Back to AC4IR License history →