Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W1NDI callsign genealogy
Currently held by KALKOFEN, JAMES G
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 W1NDI's current licensee, walking backwards.
- KALKOFEN, JAMES GMOgranted 2005-08-03cancelled 2015-07-24
Successor callsigns
Callsigns held now by people who previously held W1NDI.
No current licensee on record previously held this callsign.