Confidence: Medium · Source: FCC ULS · As of 2026-09-14
N4MCA callsign genealogy
Currently held by WALKER, JAMES A
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 N4MCA's current licensee, walking backwards.
- Martinez Sr, Cesar ANCgranted 2024-05-03cancelled 2024-06-18
Successor callsigns
Callsigns held now by people who previously held N4MCA.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N4MCA, oldest first.
- WALKER, JAMES A FL2010-01-01 → cancelled 2022-01-05
- Martinez Sr, Cesar A NC2024-06-18 active