Confidence: Medium · Source: FCC ULS · As of 2026-09-12
NP4GH callsign genealogy
Currently held by MARTINEZ, JOSE R
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 NP4GH's current licensee, walking backwards.
- HERNANDEZ RODRIGUEZ, GUILLERMO APRgranted 2007-07-03cancelled 2007-07-24
Successor callsigns
Callsigns held now by people who previously held NP4GH.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign NP4GH, oldest first.
- MARTINEZ, JOSE R PR1995-04-21 → cancelled 2007-04-24
- HERNANDEZ RODRIGUEZ, GUILLERMO A VA2017-07-01 active