Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W4JOS callsign genealogy
Currently held by van 't Hooft, Jos
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 W4JOS's current licensee, walking backwards.
- Vanthooft, JOS CGAgranted 1999-06-14cancelled 2000-07-04
Successor callsigns
Callsigns held now by people who previously held W4JOS.
No current licensee on record previously held this callsign.