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

K9ABO callsign genealogy

Currently held by McDonnell, Aidan E

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 K9ABO's current licensee, walking backwards.

  1. KM6NUScancelled· G
    Corral, OscarCAgranted 2014-01-16cancelled 2018-09-11
  2. KK6IUNcancelled· G
    Corral, OscarCAgranted 2014-01-16cancelled 2017-11-03

Successor callsigns

Callsigns held now by people who previously held K9ABO.

  1. K9ETSactive· T
    McDonnell, Aidan EINgranted 2026-05-16

All historical holders

Every license row we've seen with the callsign K9ABO, oldest first.

  • McDonnell, Aidan E IN
    2015-11-28 → cancelled 2016-07-06
  • Corral, Oscar CA
    2018-09-11 active
← Back to K9ABO License history →