Confidence: Medium · Source: FCC ULS · As of 2026-09-14
WA9NBO callsign genealogy
Currently held by OLENDORF JR, WILLIAM C
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 WA9NBO's current licensee, walking backwards.
The current licensee has not held any other callsign on record.
Successor callsigns
Callsigns held now by people who previously held WA9NBO.
- OLENDORF JR, WILLIAM CSCgranted 2024-10-12