Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K9ZS callsign genealogy
Currently held by Billings, Donald F
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 K9ZS's current licensee, walking backwards.
- Billings, Donald FINgranted 1997-02-04cancelled 2003-05-13
Successor callsigns
Callsigns held now by people who previously held K9ZS.
No current licensee on record previously held this callsign.