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sensors Mode-S transponder

A5731C

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N450LF · BELL 407 · operated by LIFE FLIGHT NETWORK LLC

Hex
A5731C
Octal
51271434
Decimal
10,842,908
Country
US
Tail
N450LF
Type
B407
No current signal · last broadcast 2d ago
Flights observed
131
Distinct callsigns
1
Country
US
Last broadcast
2d ago

Last known position

Most recent position reported by Mode-S A5731C.

Country allocation

The ICAO 24-bit address A5731C 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
N450LF - 131 2026-07-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 N450LF - Jul 13, 02:50 UTCJul 13, 03:40 UTC50m
2026-07-13 N450LF - Jul 13, 01:40 UTCJul 13, 02:01 UTC20m
2026-07-12 N450LF - Jul 12, 21:35 UTCJul 12, 21:45 UTC10m
2026-07-12 N450LF - Jul 12, 20:05 UTCJul 12, 20:20 UTC15m
2026-07-12 N450LF - Jul 12, 09:05 UTCJul 12, 09:20 UTC15m
2026-07-11 N450LF - Jul 11, 06:30 UTCJul 11, 07:35 UTC1h 5m
2026-07-09 N450LF - Jul 9, 21:25 UTCJul 9, 21:45 UTC20m
2026-07-09 N450LF - Jul 9, 10:55 UTCJul 9, 11:55 UTC1h 0m
2026-07-09 N450LF - Jul 9, 09:50 UTCJul 9, 10:30 UTC40m
2026-07-07 N450LF - Jul 7, 22:10 UTCJul 7, 22:20 UTC10m
2026-07-07 N450LF - Jul 7, 20:25 UTCJul 7, 20:55 UTC30m
2026-07-05 N450LF - Jul 5, 01:20 UTCJul 5, 01:30 UTC10m
2026-07-05 N450LF - Jul 5, 00:25 UTCJul 5, 00:50 UTC25m
2026-07-03 N450LF - Jul 3, 05:50 UTCJul 3, 06:05 UTC15m
2026-07-03 N450LF - Jul 3, 01:55 UTCJul 3, 02:05 UTC10m
2026-07-03 N450LF - Jul 3, 01:00 UTCJul 3, 01:15 UTC15m
2026-07-02 N450LF - Jul 2, 19:50 UTCJul 2, 20:00 UTC10m
2026-07-02 N450LF - Jul 2, 18:55 UTCJul 2, 19:10 UTC15m
2026-07-01 N450LF - Jul 1, 13:55 UTCJul 1, 14:25 UTC30m
2026-07-01 N450LF - Jul 1, 12:45 UTCJul 1, 13:25 UTC40m
2026-07-01 N450LF - Jul 1, 04:55 UTCJul 1, 05:30 UTC35m
2026-07-01 N450LF - Jul 1, 03:15 UTCJul 1, 03:55 UTC40m
2026-06-30 N450LF - Jun 30, 23:55 UTCJul 1, 01:05 UTC1h 10m
2026-06-30 N450LF - Jun 30, 22:30 UTCJun 30, 23:10 UTC40m
2026-06-30 N450LF - Jun 30, 17:00 UTCJun 30, 18:35 UTC1h 35m
2026-06-30 N450LF - Jun 30, 15:15 UTCJun 30, 16:15 UTC1h 0m
2026-06-30 N450LF - Jun 30, 04:20 UTCJun 30, 05:45 UTC1h 25m
2026-06-30 N450LF - Jun 30, 03:20 UTCJun 30, 03:50 UTC30m
2026-06-29 N450LF - Jun 29, 17:49 UTCJun 29, 18:25 UTC35m
2026-06-25 N450LF - Jun 25, 22:34 UTCJun 25, 22:45 UTC10m
2026-06-25 N450LF - Jun 25, 19:20 UTCJun 25, 19:34 UTC15m
2026-06-25 N450LF - Jun 25, 18:29 UTCJun 25, 18:50 UTC20m
2026-06-25 N450LF - Jun 25, 00:49 UTCJun 25, 01:19 UTC30m
2026-06-24 N450LF - Jun 24, 22:14 UTCJun 24, 22:49 UTC35m
2026-06-24 N450LF - Jun 24, 12:14 UTCJun 24, 12:50 UTC35m
2026-06-24 N450LF - Jun 24, 10:04 UTCJun 24, 10:39 UTC35m
2026-06-24 N450LF - Jun 24, 02:20 UTCJun 24, 02:49 UTC30m
2026-06-24 N450LF - Jun 24, 01:14 UTCJun 24, 01:49 UTC35m
2026-06-23 N450LF - Jun 23, 20:34 UTCJun 23, 21:24 UTC50m
2026-06-23 N450LF - Jun 23, 19:15 UTCJun 23, 19:19 UTC5m
2026-06-23 N450LF - Jun 23, 08:04 UTCJun 23, 08:39 UTC35m
2026-06-23 N450LF - Jun 23, 06:29 UTCJun 23, 06:59 UTC30m
2026-06-23 N450LF - Jun 23, 03:20 UTCJun 23, 03:34 UTC15m
2026-06-23 N450LF - Jun 23, 02:24 UTCJun 23, 02:45 UTC20m
2026-06-22 N450LF - Jun 22, 18:04 UTCJun 22, 18:44 UTC40m
2026-06-22 N450LF - Jun 22, 16:50 UTCJun 22, 17:20 UTC30m
2026-06-22 N450LF - Jun 22, 12:54 UTCJun 22, 13:59 UTC1h 5m
2026-06-22 N450LF - Jun 22, 11:30 UTCJun 22, 12:05 UTC35m
2026-06-22 N450LF - Jun 22, 08:04 UTCJun 22, 08:35 UTC30m
2026-06-22 N450LF - Jun 22, 06:00 UTCJun 22, 06:39 UTC40m

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 N450LF page for operator, model, and routing details .

Mode-S A5731C frequently asked

What is Mode-S code A5731C?
A5731C is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N450LF.
Where is Mode-S A5731C registered?
Mode-S code A5731C 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 A5731C broadcasting right now?
No active broadcast right now. Last signal was 2d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A5731C, octal 51271434, decimal 10,842,908.
What flights does A5731C operate?
Mode-S A5731C has broadcast 1 distinct callsign, including N450LF.