uls-tracker
Sign in
Confidence: Medium · Source: FCC ULS · As of 2026-09-14

K0AAR callsign genealogy

Currently held by Bylin, John A

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 K0AAR's current licensee, walking backwards.

  1. K0SASactive· E
    SHOLTY, STEPHEN AIAgranted 2015-10-10
  2. KS0Eactive· E
    ACERRA, ALEX JCOgranted 2017-10-31
  3. W2PBRcancelled· E
    ACERRA, ALEX JCOgranted 2015-10-16cancelled 2017-10-31
  4. KC2ESNcancelled· G
    ACERRA, ALEX JCOgranted 2009-05-12cancelled 2015-10-16

Successor callsigns

Callsigns held now by people who previously held K0AAR.

No current licensee on record previously held this callsign.

All historical holders

Every license row we've seen with the callsign K0AAR, oldest first.

  • Bylin, John A IA
    2003-10-15 → cancelled 2013-05-16
  • Siouxland Ares Skywarn Inc IA
    2023-08-25 active
← Back to K0AAR License history →