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

WO4K callsign genealogy

Currently held by KENNEDY, WILLIAM C

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 WO4K's current licensee, walking backwards.

  1. W4FLNcancelled· E
    Nocera, Frank LFLgranted 2010-10-05cancelled 2016-03-12
  2. KJ4YIUcancelled· T
    Nocera, Frank LFLgranted 2010-09-14cancelled 2010-10-05

Successor callsigns

Callsigns held now by people who previously held WO4K.

No current licensee on record previously held this callsign.

All historical holders

Every license row we've seen with the callsign WO4K, oldest first.

  • KENNEDY, WILLIAM C FL
    2004-02-17 → cancelled 2016-02-23
  • Nocera, Frank L FL
    2026-03-10 active
← Back to WO4K License history →