Confidence: Medium · Source: FCC ULS · As of 2026-09-14
WW9JON callsign genealogy
Currently held by Sanfilippo, Jon 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 WW9JON's current licensee, walking backwards.
- Sanfilippo, Jon WWIgranted 2010-04-26cancelled 2010-07-16
Successor callsigns
Callsigns held now by people who previously held WW9JON.
No current licensee on record previously held this callsign.