Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W9CBS callsign genealogy
Currently held by Kaas, Raymond F
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 W9CBS's current licensee, walking backwards.
- Kaas, Robert JMDgranted 2021-06-11cancelled 2022-02-15
Successor callsigns
Callsigns held now by people who previously held W9CBS.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W9CBS, oldest first.
- Kaas, Raymond F WI2013-01-17 → cancelled 2021-11-21
- Kaas, Robert J MD2022-02-15 active