Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W9JMB callsign genealogy
Currently held by Berglund, John 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 W9JMB's current licensee, walking backwards.
- Berglund, John MFLgranted 2014-03-31cancelled 2014-05-03
Successor callsigns
Callsigns held now by people who previously held W9JMB.
No current licensee on record previously held this callsign.