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

KD4AV callsign genealogy

Currently held by Williams, Ying P

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 KD4AV's current licensee, walking backwards.

  1. W4PINcancelled· E
    WARREN, JEFFREY JVAgranted 2015-03-13cancelled 2020-04-10
  2. KV4XGcancelled· E
    WARREN, JEFFREY JVAgranted 2013-03-25cancelled 2015-03-13
  3. KK4PVJcancelled· E
    WARREN, JEFFREY JVAgranted 2013-03-25cancelled 2014-04-16

Successor callsigns

Callsigns held now by people who previously held KD4AV.

  1. W4PINcancelled· E
    Williams, Ying PFLgranted 2012-12-22cancelled 2013-02-22

All historical holders

Every license row we've seen with the callsign KD4AV, oldest first.

  • Williams, Ying P FL
    2006-07-05 → cancelled 2012-12-22
  • Williams, Ying P FL
    2022-11-30 active
← Back to KD4AV License history →