Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W6CJM callsign genealogy
Currently held by MAY, CHRISTOPHER J
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 W6CJM's current licensee, walking backwards.
- MAY, CHRISTOPHER JCAgranted 2012-12-11cancelled 2020-07-24
Successor callsigns
Callsigns held now by people who previously held W6CJM.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W6CJM, oldest first.
- Madaffer, Christopher J CA2007-06-29 → cancelled 2019-07-02
- MAY, CHRISTOPHER J CA2020-07-24 active