Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W9XL callsign genealogy
Currently held by KOSTREWA, JAMES E
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 W9XL's current licensee, walking backwards.
- KOSTREWA, JAMES Ecancelled 1998-06-18
Successor callsigns
Callsigns held now by people who previously held W9XL.
No current licensee on record previously held this callsign.