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

AC9DR callsign genealogy

Currently held by SIERP, MATTHEW D

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 AC9DR's current licensee, walking backwards.

  1. W9DHRcancelled· E
    Roberson, DonaldWIgranted 2020-02-14cancelled 2021-02-27
  2. N9DHRcancelled· E
    Roberson, Donald HWIgranted 2018-07-31cancelled 2020-02-14
  3. AD9DRactive· E
    REAVIS, DENNIS RILgranted 2021-05-14
  4. KC9IRLcancelled· E
    REAVIS, DENNIS RILgranted 2015-11-10cancelled 2021-05-14

Successor callsigns

Callsigns held now by people who previously held AC9DR.

  1. AC8DRcancelled· E
    Roberson, Donald HOHgranted 2021-07-30cancelled 2022-05-24
  2. AC9JOcancelled· E
    SIERP, MATTHEW DINgranted 2013-05-14cancelled 2014-10-10

All historical holders

Every license row we've seen with the callsign AC9DR, oldest first.

  • SIERP, MATTHEW D IN
    2013-05-14 → cancelled 2014-10-09
  • Roberson, Donald H OH
    2021-02-27 → cancelled 2021-07-30
← Back to AC9DR License history →