Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KP4ZEM callsign genealogy
Currently held by MARTINEZ, ZABDIEL E
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 KP4ZEM's current licensee, walking backwards.
- MARTINEZ, ZABDIEL EMAgranted 2019-02-19cancelled 2019-03-09
Successor callsigns
Callsigns held now by people who previously held KP4ZEM.
No current licensee on record previously held this callsign.