Confidence: Medium · Source: FCC ULS · As of 2026-09-14
N4EFK callsign genealogy
Currently held by MERCER JR, MALCOLM C
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 N4EFK's current licensee, walking backwards.
The current licensee has not held any other callsign on record.
Successor callsigns
Callsigns held now by people who previously held N4EFK.
- MERCER JR, MALCOLM CVAgranted 2024-04-20cancelled 2025-09-10