Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N4HDM callsign genealogy
Currently held by SEPULVEDA, MARISOL
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 N4HDM's current licensee, walking backwards.
- WESTPHALEN, TERRY LNCgranted 2015-08-06cancelled 2018-06-22
Successor callsigns
Callsigns held now by people who previously held N4HDM.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N4HDM, oldest first.
- SEPULVEDA, MARISOL FL1993-01-12 → cancelled 2005-01-13
- WESTPHALEN, TERRY L NC2018-06-22 active