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Confidence: Medium · Source: FCC ULS · As of 2026-09-12

NP4TT callsign genealogy

Currently held by Radio Club Mala Hierba Azul

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 NP4TT's current licensee, walking backwards.

  1. KY4AAcancelled
    Radio Club Mala Hierba AzulPRgranted 2011-11-09cancelled 2021-06-15
  2. KG4LCEcancelled
    DAWSON HILL CONTEST CLUBKYgranted 2001-01-05cancelled 2001-02-06

Successor callsigns

Callsigns held now by people who previously held NP4TT.

No current licensee on record previously held this callsign.

All historical holders

Every license row we've seen with the callsign NP4TT, oldest first.

  • RIVERA ESCOBALES, PEDRO PR
    2006-05-08 → cancelled 2018-07-17
  • Radio Club Mala Hierba Azul PR
    2021-06-15 active
← Back to NP4TT License history →