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

WP4NFF callsign genealogy

Currently held by VELEZ NIEVES, JOEL

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 WP4NFF's current licensee, walking backwards.

  1. KP3COcancelled· E
    VELEZ NIEVES, JOELPRgranted 2015-12-14cancelled 2017-07-25

Successor callsigns

Callsigns held now by people who previously held WP4NFF.

  1. KP3ECactive· E
    VELEZ NIEVES, JOELPRgranted 2018-05-11
  2. KP3COcancelled· E
    VELEZ NIEVES, JOELPRgranted 2015-12-14cancelled 2017-07-25

All historical holders

Every license row we've seen with the callsign WP4NFF, oldest first.

  • VELEZ NIEVES, JOEL PR
    2005-10-28 → cancelled 2015-04-23
  • VELEZ NIEVES, JOEL PR
    2017-07-25 → cancelled 2018-05-11
← Back to WP4NFF License history →