Confidence: Medium · Source: FCC ULS · As of 2026-09-09

KN4MM

Active

MCALISTER, SIDNEY R

Location: FLAGLER BEACH, FL
Class: Amateur Extra
Granted: 2021-02-09
Expires: 2030-08-04
Previous call: N4TKH
FRN: 0003212198

Get notified about status changes and vanity availability for this callsign.

Vanity availability

Held

Currently held

KN4MM is held by an active license; it isn't a vanity slot right now.

Vanity availability dates are computed from FCC §97.19's hold periods: 2 years from the cancellation date for cancelled or terminated licenses, 4 years from the expiration date for expired licenses (2-year renewal grace + 2-year hold).

Callsign genealogy

Full chain →

Previously held by current licensee

N4TKHactive· E
Heard, Thomas KALgranted 2025-01-14
KQ4PTXcancelled· E
Heard, Thomas KALgranted 2024-03-14cancelled 2025-01-14

License history

0 events

No recorded events.

More vanity slots coming available

From Florida

All →

K4HCL 2026-09-09
KG4UZU 2026-09-09
KG4UZX 2026-09-09
KK4LMR 2026-09-09
W3EFZ 2026-09-09

Starting with KN4

All →

KN4ZVG FL · 2026-09-17
KN4LGK GA · 2026-09-21
KN4VXC NC · 2026-09-21
KN4RPM VA · 2026-10-07
KN4GAM GA · 2026-10-12

Full history → Vanity availability → Callsign genealogy →