Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W9ZZ callsign genealogy
Currently held by NAPOLITAN, RUDOLPH J
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 W9ZZ's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held W9ZZ.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W9ZZ, oldest first.
- NAPOLITAN, RUDOLPH J IL2006-01-12 → cancelled 2018-04-13
- Lerma, Jonas J CA2018-05-01 active