Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K6JMB callsign genealogy
Currently held by BOYLE, JAMES 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 K6JMB's current licensee, walking backwards.
- BLOCH, JAMES MCAgranted 1995-03-15cancelled 2003-05-30
Successor callsigns
Callsigns held now by people who previously held K6JMB.
- BOYLE, JAMES MORgranted 2000-06-10cancelled 2012-06-12
All historical holders
Every license row we've seen with the callsign K6JMB, oldest first.
- BOYLE, JAMES M CA1999-03-11 → cancelled 2000-06-10
- BLOCH, JAMES M CA2023-06-02 active