Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W9LOS callsign genealogy
Currently held by CUPKA Mr, THOMAS 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 W9LOS's current licensee, walking backwards.
- CUPKA, THOMAS WINgranted 2013-03-25cancelled 2013-04-19
Successor callsigns
Callsigns held now by people who previously held W9LOS.
No current licensee on record previously held this callsign.