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

KP4CJ callsign genealogy

Currently held by CORDERO, FRANCISCO

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 KP4CJ's current licensee, walking backwards.

  1. KG4DLAcancelled· E
    CRUZ MASSAS, JOSE LPRgranted 2009-04-15cancelled 2009-06-02
  2. WP4RUcancelled
    cancelled 1999-05-27

Successor callsigns

Callsigns held now by people who previously held KP4CJ.

  1. KP4FCactive· E
    CORDERO, FRANCISCOFLgranted 2022-10-12

All historical holders

Every license row we've seen with the callsign KP4CJ, oldest first.

  • CORDERO, FRANCISCO PR
    1995-11-28 → cancelled 2002-11-30
  • CRUZ, JOSE L FL
    2019-03-09 active
← Back to KP4CJ License history →