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sensors Mode-S transponder

A57A8A

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N452LF · operated by LIFE FLIGHT NETWORK LLC

Hex
A57A8A
Octal
51275212
Decimal
10,844,810
Country
US
Tail
N452LF
Type
B407
No current signal · last broadcast Jul 26, 17:30 UTC
Flights observed
227
Distinct callsigns
1
Country
US
Last broadcast
Jul 26, 17:30 UTC

Last known position

Most recent position reported by Mode-S A57A8A.

Country allocation

The ICAO 24-bit address A57A8A 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
N452LF - 227 2026-07-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 N452LF - Jul 26, 16:45 UTCJul 26, 17:30 UTC45m
2026-07-25 N452LF - Jul 25, 05:15 UTCJul 25, 05:55 UTC40m
2026-07-25 N452LF - Jul 25, 04:35 UTCJul 25, 04:45 UTC10m
2026-07-25 N452LF - Jul 25, 03:05 UTCJul 25, 03:55 UTC50m
2026-07-25 N452LF - Jul 25, 02:10 UTCJul 25, 02:25 UTC15m
2026-07-24 N452LF - Jul 24, 09:00 UTCJul 24, 09:15 UTC15m
2026-07-24 N452LF - Jul 24, 05:30 UTCJul 24, 05:55 UTC25m
2026-07-24 N452LF - Jul 24, 03:05 UTCJul 24, 03:20 UTC15m
2026-07-23 N452LF - Jul 23, 09:30 UTCJul 23, 11:35 UTC2h 5m
2026-07-23 N452LF - Jul 23, 05:05 UTCJul 23, 06:00 UTC55m
2026-07-23 N452LF - Jul 23, 04:00 UTCJul 23, 04:20 UTC20m
2026-07-23 N452LF - Jul 23, 00:10 UTCJul 23, 00:45 UTC35m
2026-07-22 N452LF - Jul 22, 22:00 UTCJul 22, 22:35 UTC35m
2026-07-22 N452LF - Jul 22, 18:15 UTCJul 22, 18:35 UTC20m
2026-07-22 N452LF - Jul 22, 17:10 UTCJul 22, 17:30 UTC20m
2026-07-22 N452LF - Jul 22, 02:15 UTCJul 22, 02:55 UTC40m
2026-07-21 N452LF - Jul 21, 23:20 UTCJul 22, 00:05 UTC45m
2026-07-21 N452LF - Jul 21, 21:10 UTCJul 21, 21:25 UTC15m
2026-07-21 N452LF - Jul 21, 01:50 UTCJul 21, 02:25 UTC35m
2026-07-20 N452LF - Jul 20, 23:00 UTCJul 21, 00:20 UTC1h 20m
2026-07-20 N452LF - Jul 20, 19:55 UTCJul 20, 20:40 UTC45m
2026-07-20 N452LF - Jul 20, 18:05 UTCJul 20, 19:20 UTC1h 15m
2026-07-20 N452LF - Jul 20, 16:55 UTCJul 20, 17:10 UTC15m
2026-07-20 N452LF SFF → SFF Jul 20, 02:30 UTCJul 20, 03:30 UTC1h 0m
2026-07-19 N452LF - Jul 19, 19:40 UTCJul 19, 20:05 UTC25m
2026-07-19 N452LF - Jul 19, 17:55 UTCJul 19, 18:30 UTC35m
2026-07-19 N452LF - Jul 19, 14:05 UTCJul 19, 14:45 UTC40m
2026-07-19 N452LF - Jul 19, 10:00 UTCJul 19, 10:10 UTC10m
2026-07-19 N452LF - Jul 19, 09:10 UTCJul 19, 09:20 UTC10m
2026-07-19 N452LF - Jul 19, 04:40 UTCJul 19, 04:55 UTC15m
2026-07-19 N452LF - Jul 19, 03:35 UTCJul 19, 04:05 UTC30m
2026-07-19 N452LF - Jul 19, 02:30 UTCJul 19, 03:00 UTC30m
2026-07-18 N452LF - Jul 18, 20:00 UTCJul 18, 20:20 UTC20m
2026-07-18 N452LF - Jul 18, 19:05 UTCJul 18, 19:25 UTC20m
2026-07-18 N452LF - Jul 18, 04:40 UTCJul 18, 04:55 UTC15m
2026-07-18 N452LF - Jul 18, 03:10 UTCJul 18, 03:20 UTC10m
2026-07-17 N452LF - Jul 17, 05:15 UTCJul 17, 06:05 UTC50m
2026-07-17 N452LF - Jul 17, 02:54 UTCJul 17, 03:14 UTC20m
2026-07-16 N452LF SFF → SFF Jul 16, 23:49 UTCJul 17, 01:15 UTC1h 25m
2026-07-16 N452LF - Jul 16, 20:35 UTCJul 16, 21:19 UTC45m
2026-07-16 N452LF SFF → SFF Jul 16, 10:15 UTCJul 16, 10:29 UTC15m
2026-07-16 N452LF - Jul 16, 02:25 UTCJul 16, 04:00 UTC1h 35m
2026-07-15 N452LF - Jul 15, 21:40 UTCJul 15, 22:10 UTC30m
2026-07-15 N452LF - Jul 15, 20:25 UTCJul 15, 20:40 UTC15m
2026-07-15 N452LF - Jul 15, 19:30 UTCJul 15, 19:45 UTC15m
2026-07-15 N452LF - Jul 15, 18:25 UTCJul 15, 18:40 UTC15m
2026-07-15 N452LF - Jul 15, 14:00 UTCJul 15, 14:20 UTC20m
2026-07-15 N452LF - Jul 15, 03:00 UTCJul 15, 03:25 UTC25m
2026-07-15 N452LF - Jul 15, 02:00 UTCJul 15, 02:25 UTC25m
2026-07-14 N452LF - Jul 14, 11:45 UTCJul 14, 11:55 UTC10m

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 N452LF page for operator, model, and routing details .

Mode-S A57A8A frequently asked

What is Mode-S code A57A8A?
A57A8A is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N452LF.
Where is Mode-S A57A8A registered?
Mode-S code A57A8A 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 A57A8A broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 17:30 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A57A8A, octal 51275212, decimal 10,844,810.
What flights does A57A8A operate?
Mode-S A57A8A has broadcast 1 distinct callsign, including N452LF.