Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N3CMZ callsign genealogy
Currently held by Zabala, Carlos 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 N3CMZ's current licensee, walking backwards.
- ZABALA, CARLOS MMDgranted 2024-01-17cancelled 2024-02-06
Successor callsigns
Callsigns held now by people who previously held N3CMZ.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N3CMZ, oldest first.
- JOHNSTON, S HARTLEY PA2005-12-21 → cancelled 2018-03-20
- Zabala, Carlos M MD2024-02-06 active