Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4DCM callsign genealogy
Currently held by GREENSTEIN, MARTIN 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 K4DCM's current licensee, walking backwards.
- Jones, Ronnie WTNgranted 2013-04-08cancelled 2013-10-17
Successor callsigns
Callsigns held now by people who previously held K4DCM.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4DCM, oldest first.
- GREENSTEIN, MARTIN M FL2001-03-20 → cancelled 2013-03-21
- Jones, Ronnie W TN2025-07-31 active