uls-tracker
Sign in
Confidence: Medium · Source: FCC ULS · As of 2026-09-12

AC9MB callsign genealogy

Currently held by Buchanan, Matthew W

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 AC9MB's current licensee, walking backwards.

  1. WA9MACactive· T
    CRUM, MARYANNEINgranted 2022-12-13
  2. KD9WBRcancelled· T
    CRUM, MARYANNEINgranted 2022-11-23cancelled 2022-12-13

Successor callsigns

Callsigns held now by people who previously held AC9MB.

  1. NQ9Tcancelled· E
    Buchanan, Matthew WINgranted 2015-05-01cancelled 2019-04-06
  2. WA9MACcancelled· E
    Buchanan, Matthew WINgranted 2014-06-27cancelled 2014-10-04

All historical holders

Every license row we've seen with the callsign AC9MB, oldest first.

  • Buchanan, Matthew W IN
    2013-05-14 → cancelled 2014-06-27
  • Buchanan, Matthew W IN
    2014-10-04 → cancelled 2015-05-01
← Back to AC9MB License history →