Confidence: Medium · Source: FCC ULS · As of 2026-09-11
N9DOC callsign genealogy
Currently held by ESTERMAN, MARTIN S
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 N9DOC's current licensee, walking backwards.
- Dewild, Matthew BIAgranted 2026-03-11cancelled 2026-03-31
Successor callsigns
Callsigns held now by people who previously held N9DOC.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N9DOC, oldest first.
- ESTERMAN, MARTIN S GA1987-10-06 → cancelled 1999-10-07
- Quade, Kevin J MO2013-05-24 → cancelled 2025-06-26
- Dewild, Matthew B IA2026-03-31 active