Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N5APA callsign genealogy
Currently held by Hildebrandt PhD, David M
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 N5APA's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held N5APA.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N5APA, oldest first.
- SCHULTZ, ROBERT D TX1997-09-30 → cancelled 2007-01-19
- Hildebrandt PhD, David M CA2021-02-17 active