Apparatus

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sensors Mode-S transponder

A66647

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N511MP · CESSNA 172 Skyhawk · operated by N511MP LLC

Hex
A66647
Octal
51463107
Decimal
10,905,159
Country
US
Tail
N511MP
Type
C172
No current signal · last broadcast 1d ago
Flights observed
10
Distinct callsigns
1
Country
US
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S A66647.

Country allocation

The ICAO 24-bit address A66647 falls within the block assigned to United States (US) by ICAO Annex 10, Volume III. Every aircraft registered in United States receives a permanent address from this block at the time of registration; the address stays with the airframe even if the aircraft is re-registered to a different operator within the country.

Callsign history 1 distinct

Callsign Airline Flights Last seen
N511MP - 10 2026-04-13

Recent flights last 10

DateFlightRouteTakeoffLandingDuration
2026-04-13 N511MP - Apr 13, 22:20 UTCApr 13, 23:05 UTC45m
2026-04-13 N511MP FXE → FXE Apr 13, 20:10 UTCApr 13, 20:45 UTC35m
2026-04-13 N511MP - Apr 13, 16:15 UTCApr 13, 16:50 UTC35m
2026-04-13 N511MP - Apr 13, 15:50 UTCApr 13, 16:50 UTC1h 0m
2026-04-13 N511MP - Apr 13, 15:35 UTCApr 13, 16:15 UTC40m
2026-04-13 N511MP - Apr 13, 12:20 UTCApr 13, 12:55 UTC35m
2026-04-13 N511MP - Apr 13, 12:00 UTCApr 13, 12:15 UTC15m
2026-04-13 N511MP - Apr 13, 00:20 UTCApr 13, 00:30 UTC10m
2026-04-12 N511MP - Apr 12, 23:55 UTCApr 13, 00:30 UTC35m
2026-04-12 N511MP - Apr 12, 18:40 UTCApr 12, 19:50 UTC1h 10m

About Mode-S

A Mode-S transponder code (also called an "ICAO 24-bit address" or "hex code") is a 6-character hexadecimal identifier permanently assigned to an aircraft when it's first registered. Unlike callsigns (which change with each flight) or registrations (which can change if an aircraft is sold internationally), the Mode-S address stays with the airframe for the life of the aircraft in that country.

Every ADS-B transmission from an aircraft includes its Mode-S address, making it the most reliable way to identify a specific airframe. Flight-tracking services like Apparatus use the Mode-S address as the primary key for tying position broadcasts, callsigns, and ownership records together.

Prefer a tail-number view? See the N511MP page for operator, model, and routing details .

Mode-S A66647 frequently asked

What is Mode-S code A66647?
A66647 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N511MP.
Where is Mode-S A66647 registered?
Mode-S code A66647 is allocated to United States (US). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is A66647 broadcasting right now?
No active broadcast right now. Last signal was 1d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A66647, octal 51463107, decimal 10,905,159.
What flights does A66647 operate?
Mode-S A66647 has broadcast 1 distinct callsign, including N511MP.