Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W1CMB callsign genealogy
Currently held by Bower, Chris M
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 W1CMB's current licensee, walking backwards.
- Berliner, Carl MWAgranted 2017-08-31cancelled 2018-04-17
Successor callsigns
Callsigns held now by people who previously held W1CMB.
- Bower, Chris MOHgranted 2007-09-05cancelled 2019-09-06
All historical holders
Every license row we've seen with the callsign W1CMB, oldest first.
- Bower, Chris M OH2003-02-21 → cancelled 2007-09-05
- Berliner, Carl M WA2018-04-17 active