Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KN4MM callsign genealogy
Currently held by MCALISTER, SIDNEY R
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 KN4MM's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held KN4MM.
No current licensee on record previously held this callsign.