Apparatus

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sensors Mode-S transponder

A576D3

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N451LF · BELL 407 · operated by LIFE FLIGHT NETWORK LLC

Hex
A576D3
Octal
51273323
Decimal
10,843,859
Country
US
Tail
N451LF
Type
B407
No current signal · last broadcast 1d ago
Flights observed
192
Distinct callsigns
1
Country
US
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S A576D3.

Country allocation

The ICAO 24-bit address A576D3 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
N451LF - 192 2026-07-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 N451LF - Jul 13, 08:25 UTCJul 13, 08:35 UTC10m
2026-07-13 N451LF - Jul 13, 07:40 UTCJul 13, 07:55 UTC15m
2026-07-11 N451LF - Jul 11, 09:10 UTCJul 11, 09:20 UTC10m
2026-07-11 N451LF - Jul 11, 08:05 UTCJul 11, 08:20 UTC15m
2026-07-10 N451LF - Jul 10, 22:20 UTCJul 10, 22:40 UTC20m
2026-07-10 N451LF - Jul 10, 21:05 UTCJul 10, 21:25 UTC20m
2026-07-10 N451LF - Jul 10, 19:25 UTCJul 10, 19:45 UTC20m
2026-07-10 N451LF - Jul 10, 18:45 UTCJul 10, 18:55 UTC10m
2026-07-09 N451LF - Jul 9, 09:30 UTCJul 9, 09:45 UTC15m
2026-07-09 N451LF - Jul 9, 06:50 UTCJul 9, 07:45 UTC55m
2026-07-09 N451LF - Jul 9, 06:05 UTCJul 9, 06:25 UTC20m
2026-07-08 N451LF - Jul 8, 19:10 UTCJul 8, 19:25 UTC15m
2026-07-08 N451LF - Jul 8, 18:20 UTCJul 8, 18:45 UTC25m
2026-07-07 N451LF - Jul 7, 22:20 UTCJul 7, 22:40 UTC20m
2026-07-07 N451LF - Jul 7, 11:10 UTCJul 7, 11:40 UTC30m
2026-07-07 N451LF - Jul 7, 10:15 UTCJul 7, 10:35 UTC20m
2026-07-07 N451LF - Jul 7, 08:35 UTCJul 7, 08:55 UTC20m
2026-07-07 N451LF - Jul 7, 07:20 UTCJul 7, 07:55 UTC35m
2026-07-07 N451LF - Jul 7, 03:40 UTCJul 7, 04:05 UTC25m
2026-07-07 N451LF - Jul 7, 02:35 UTCJul 7, 03:05 UTC30m
2026-07-05 N451LF - Jul 5, 10:20 UTCJul 5, 11:45 UTC1h 25m
2026-07-05 N451LF - Jul 5, 07:00 UTCJul 5, 07:25 UTC25m
2026-07-05 N451LF - Jul 5, 05:10 UTCJul 5, 05:50 UTC40m
2026-07-05 N451LF - Jul 5, 00:35 UTCJul 5, 01:05 UTC30m
2026-07-04 N451LF - Jul 4, 21:50 UTCJul 4, 22:30 UTC40m
2026-07-04 N451LF - Jul 4, 20:30 UTCJul 4, 21:00 UTC30m
2026-07-04 N451LF - Jul 4, 19:30 UTCJul 4, 19:45 UTC15m
2026-07-04 N451LF - Jul 4, 04:20 UTCJul 4, 04:45 UTC25m
2026-07-04 N451LF - Jul 4, 03:20 UTCJul 4, 03:50 UTC30m
2026-07-03 N451LF - Jul 3, 23:15 UTCJul 3, 23:50 UTC35m
2026-07-03 N451LF - Jul 3, 21:55 UTCJul 3, 22:35 UTC40m
2026-07-03 N451LF - Jul 3, 20:15 UTCJul 3, 20:35 UTC20m
2026-07-03 N451LF - Jul 3, 19:25 UTCJul 3, 19:35 UTC10m
2026-07-03 N451LF - Jul 3, 18:45 UTCJul 3, 18:50 UTC5m
2026-07-03 N451LF - Jul 3, 13:05 UTCJul 3, 13:50 UTC45m
2026-07-03 N451LF - Jul 3, 12:25 UTCJul 3, 12:35 UTC10m
2026-07-03 N451LF - Jul 3, 07:05 UTCJul 3, 07:35 UTC30m
2026-07-03 N451LF - Jul 3, 05:55 UTCJul 3, 06:30 UTC35m
2026-07-03 N451LF - Jul 3, 02:25 UTCJul 3, 02:55 UTC30m
2026-07-03 N451LF - Jul 3, 01:35 UTCJul 3, 01:50 UTC15m
2026-07-02 N451LF - Jul 2, 01:20 UTCJul 2, 02:25 UTC1h 5m
2026-07-02 N451LF - Jul 2, 00:20 UTCJul 2, 00:40 UTC20m
2026-07-01 N451LF - Jul 1, 09:10 UTCJul 1, 09:40 UTC30m
2026-07-01 N451LF - Jul 1, 07:50 UTCJul 1, 08:25 UTC35m
2026-06-30 N451LF - Jun 30, 21:00 UTCJun 30, 21:25 UTC25m
2026-06-30 N451LF - Jun 30, 13:25 UTCJun 30, 13:45 UTC20m
2026-06-30 N451LF - Jun 30, 11:50 UTCJun 30, 12:35 UTC45m
2026-06-30 N451LF - Jun 30, 07:05 UTCJun 30, 07:35 UTC30m
2026-06-30 N451LF - Jun 30, 06:25 UTCJun 30, 06:35 UTC10m
2026-06-30 N451LF - Jun 30, 04:15 UTCJun 30, 04:40 UTC25m

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 N451LF page for operator, model, and routing details .

Mode-S A576D3 frequently asked

What is Mode-S code A576D3?
A576D3 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N451LF.
Where is Mode-S A576D3 registered?
Mode-S code A576D3 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 A576D3 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 A576D3, octal 51273323, decimal 10,843,859.
What flights does A576D3 operate?
Mode-S A576D3 has broadcast 1 distinct callsign, including N451LF.