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

K1EW callsign genealogy

Currently held by AMBROSE, JOHN

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 K1EW's current licensee, walking backwards.

  1. AB1ZXcancelled· E
    Guimaraes Filho, Izirlei VMAgranted 2015-08-20cancelled 2017-03-03
  2. KC1EGLcancelled· E
    Guimaraes Filho, Izirlei VMAgranted 2015-08-20cancelled 2016-06-16

Successor callsigns

Callsigns held now by people who previously held K1EW.

No current licensee on record previously held this callsign.

All historical holders

Every license row we've seen with the callsign K1EW, oldest first.

  • AMBROSE, JOHN RI
    2004-11-12 → cancelled 2017-02-11
  • Guimaraes Filho, Izirlei MA
    2017-03-03 active
← Back to K1EW License history →