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

K5AC callsign genealogy

Currently held by MC MASTER, JOHN B

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 K5AC's current licensee, walking backwards.

  1. KU4Jactive· E
    CORLEY, FRANK JALgranted 2019-03-12
  2. KS4UNcancelled· E
    CORLEY, FRANK JALgranted 2009-01-27cancelled 2009-03-17
  3. KU4Zactive· E
    BLEDSOE, MICHAEL DNCgranted 2020-12-11
  4. KD4QZAcancelled· E
    BLEDSOE, MICHAEL DGAgranted 2002-05-16cancelled 2011-02-15

Successor callsigns

Callsigns held now by people who previously held K5AC.

No current licensee on record previously held this callsign.

All historical holders

Every license row we've seen with the callsign K5AC, oldest first.

  • MC MASTER, JOHN B MS
    1997-09-09 → cancelled 2005-02-04
  • PEARSON, JOHN T TX
    2017-01-27 active
← Back to K5AC License history →