Confidence: Medium · Source: FCC ULS · As of 2026-09-09
W9CBM callsign genealogy
Currently held by McDermott, Charles B
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 W9CBM's current licensee, walking backwards.
- McDermott, Charles BINgranted 2020-12-11cancelled 2021-02-09
Successor callsigns
Callsigns held now by people who previously held W9CBM.
- McDermott, Charles BINgranted 2024-12-24