Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W7JCM callsign genealogy
Currently held by MONTGOMERY, JOHN C
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 W7JCM's current licensee, walking backwards.
- McMahon Jr, James CFLgranted 2008-05-13cancelled 2010-09-28
Successor callsigns
Callsigns held now by people who previously held W7JCM.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W7JCM, oldest first.
- MONTGOMERY, JOHN C OR1999-05-26 → cancelled 2005-05-22
- McMahon Jr, James C FL2020-08-08 active