Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KC4MM callsign genealogy
Currently held by KNISKERN, LE ROY J
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 KC4MM's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held KC4MM.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KC4MM, oldest first.
- FLEMING JR, JOHN W NC1998-10-05 → cancelled 2010-10-06
- KNISKERN, LE ROY J VA2011-12-30 → cancelled 2024-01-03