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

K4YO callsign genealogy

Currently held by DURLING, FRED 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 K4YO's current licensee, walking backwards.

  1. K0XAactive· E
    Aakre, Keith EMNgranted 2024-01-09
  2. NP2Ecancelled· E
    Aakre, Keith EMNgranted 2015-01-09cancelled 2024-01-09
  3. W0YNYcancelled· E
    Aakre, Keith EVIgranted 2006-03-31cancelled 2015-01-09
  4. KA0UXGcancelled· G
    AAKRE, KEITH EAZgranted 2002-04-08cancelled 2006-03-31

Successor callsigns

Callsigns held now by people who previously held K4YO.

No current licensee on record previously held this callsign.

All historical holders

Every license row we've seen with the callsign K4YO, oldest first.

  • DURLING, FRED A MD
    1997-11-10 → cancelled 2009-11-11
  • HURD, CLARENCE A FL
    2009-12-01 → cancelled 2021-12-02
  • Dixon, Tim S UT
    2021-12-21 active
← Back to K4YO License history →