Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W1JAU callsign genealogy
Currently held by Umberto Sr, Joseph A
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 W1JAU's current licensee, walking backwards.
- Umberto Sr, Joseph ANYgranted 1999-04-15cancelled 2008-02-23
Successor callsigns
Callsigns held now by people who previously held W1JAU.
- Umberto Sr, Joseph ANYgranted 2017-12-12