Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W0BOS callsign genealogy
Currently held by SULLIVAN, WILLIAM O
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 W0BOS's current licensee, walking backwards.
- SULLIVAN, WILLIAM ONDgranted 1997-08-15cancelled 2001-01-03
Successor callsigns
Callsigns held now by people who previously held W0BOS.
No current licensee on record previously held this callsign.