Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W4CMJ callsign genealogy
Currently held by Jones, Calvin 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 W4CMJ's current licensee, walking backwards.
- CYPHERS, JASONNCgranted 2023-07-08cancelled 2023-08-01
Successor callsigns
Callsigns held now by people who previously held W4CMJ.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W4CMJ, oldest first.
- Jones, Calvin M SC2010-10-01 → cancelled 2022-10-04
- CYPHERS, JASON NC2023-08-01 active