Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W9JCM callsign genealogy
Currently held by MC GRATH, 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 W9JCM's current licensee, walking backwards.
- MADRIGAL, JUANA CILgranted 2021-01-21cancelled 2021-02-09
Successor callsigns
Callsigns held now by people who previously held W9JCM.
- MC GRATH, JOHN CNVgranted 2018-04-25
All historical holders
Every license row we've seen with the callsign W9JCM, oldest first.
- MC GRATH, JOHN C NV1999-04-21 → cancelled 2008-05-28
- MADRIGAL, JUANA C IL2021-02-09 active