Confidence: Medium · Source: FCC ULS · As of 2026-09-12
NP4DM callsign genealogy
Currently held by MATIAS CHAPARRO, DAMARIS E
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 NP4DM's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held NP4DM.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign NP4DM, oldest first.
- ROSAS, EDWIN O NY2006-05-03 → cancelled 2018-05-22
- MATIAS CHAPARRO, DAMARIS E FL2018-06-08 active