Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W4NSA callsign genealogy
Currently held by Koester, Joseph W
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 W4NSA's current licensee, walking backwards.
- Koester, Joseph WTNgranted 2000-03-11cancelled 2000-08-15
Successor callsigns
Callsigns held now by people who previously held W4NSA.
No current licensee on record previously held this callsign.