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

NP4SQ callsign genealogy

Currently held by MORALES RAMOS, SIXTO

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 NP4SQ's current licensee, walking backwards.

  1. NP4AEactive· G
    RIVERA, REYNALDOPRgranted 2025-03-04
  2. KP4ZWYcancelled· G
    RIVERA, REYNALDOPRgranted 2020-10-16cancelled 2025-03-04
  3. KM4ZWYcancelled· G
    RIVERA, REYNALDOFLgranted 2016-12-22cancelled 2020-10-16

Successor callsigns

Callsigns held now by people who previously held NP4SQ.

No current licensee on record previously held this callsign.

All historical holders

Every license row we've seen with the callsign NP4SQ, oldest first.

  • MORALES RAMOS, SIXTO PR
    1995-10-16 → cancelled 2007-10-17
  • QUINONES, SAMUEL PR
    2020-09-25 active
← Back to NP4SQ License history →