Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W4ZKM callsign genealogy
Currently held by SUMNER, LYNN S
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 W4ZKM's current licensee, walking backwards.
- SUMNER, LYNN SSCgranted 1994-11-03cancelled 1999-09-28
Successor callsigns
Callsigns held now by people who previously held W4ZKM.
No current licensee on record previously held this callsign.