Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W1OSU callsign genealogy
Currently held by Gravelese, Alan 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 W1OSU's current licensee, walking backwards.
- Gravelese, Alan JMAgranted 2004-07-01cancelled 2004-08-14
Successor callsigns
Callsigns held now by people who previously held W1OSU.
No current licensee on record previously held this callsign.