Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K9NDU callsign genealogy
Currently held by Spence, David W
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 K9NDU's current licensee, walking backwards.
- Spence, David WINgranted 2009-12-16cancelled 2013-02-20
Successor callsigns
Callsigns held now by people who previously held K9NDU.
No current licensee on record previously held this callsign.