Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N7JMB callsign genealogy
Currently held by Butler, 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 N7JMB's current licensee, walking backwards.
- Morin Baxter, Joshua LSDgranted 2016-10-19cancelled 2016-11-08
Successor callsigns
Callsigns held now by people who previously held N7JMB.
- Butler, John MFLgranted 2009-03-07cancelled 2009-06-02
All historical holders
Every license row we've seen with the callsign N7JMB, oldest first.
- GRIFFIN, PAUL J WA1988-05-10 → cancelled 2000-05-11
- Butler, John M FL2009-02-07 → cancelled 2009-03-07
- Morin Baxter, Joshua L SD2016-11-08 active