Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W2JEF callsign genealogy
Currently held by Koski, Jeffrey R
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 W2JEF's current licensee, walking backwards.
- KOSKI, JEFFREY RNYgranted 1993-12-28cancelled 2000-10-24
Successor callsigns
Callsigns held now by people who previously held W2JEF.
No current licensee on record previously held this callsign.