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

KP4YB callsign genealogy

Currently held by PEREZ RODRIGUEZ, RAUL 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 KP4YB's current licensee, walking backwards.

  1. N3JAMactive· G
    Melchor, JohnPAgranted 2020-01-17
  2. KC3NDEcancelled· T
    Melchor, JohnPAgranted 2019-03-21cancelled 2020-01-17

Successor callsigns

Callsigns held now by people who previously held KP4YB.

  1. KP4CQactive· E
    PEREZ RODRIGUEZ, RAUL APRgranted 2017-07-21

All historical holders

Every license row we've seen with the callsign KP4YB, oldest first.

  • MORERA, JOEL A PR
    2017-03-20 active
  • PEREZ RODRIGUEZ, RAUL A
    — → cancelled 1997-10-14
← Back to KP4YB License history →