Apparatus

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sensors Mode-S transponder

A4CAEC

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N408FX · EMBRAER EMB545 Praetor 500 · operated by FLEXJET LLC, MCDONALD DEVELOPMENT CO AND MCDONALD CONSTRUCTION, WHITE MOUNTAIN CAPITAL INC, JOW INC, AE CAPITAL LLC, SWB AIRLINES LLC

Hex
A4CAEC
Octal
51145354
Decimal
10,799,852
Country
US
Tail
N408FX
Type
E545
No current signal · last broadcast 11h ago
Flights observed
73
Distinct callsigns
1
Country
US
Last broadcast
11h ago

Last known position

Most recent position reported by Mode-S A4CAEC.

Country allocation

The ICAO 24-bit address A4CAEC 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
LXJ408 - 73 2026-07-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 LXJ408 BFI → DAL Jul 13, 18:05 UTCJul 13, 22:00 UTC3h 55m
2026-07-12 LXJ408 - Jul 12, 21:05 UTCJul 12, 22:40 UTC1h 35m
2026-07-12 LXJ408 - Jul 12, 15:01 UTCJul 12, 19:30 UTC4h 30m
2026-07-12 LXJ408 - Jul 12, 11:45 UTCJul 12, 13:50 UTC2h 5m
2026-07-11 LXJ408 - Jul 11, 13:05 UTCJul 11, 14:50 UTC1h 45m
2026-07-11 LXJ408 - Jul 11, 10:30 UTCJul 11, 11:00 UTC30m
2026-07-10 LXJ408 - Jul 10, 17:00 UTCJul 10, 19:00 UTC2h 0m
2026-07-10 LXJ408 - Jul 10, 14:20 UTCJul 10, 15:50 UTC1h 30m
2026-07-09 LXJ408 - Jul 9, 22:15 UTCJul 10, 01:35 UTC3h 20m
2026-07-09 LXJ408 - Jul 9, 20:30 UTCJul 9, 21:25 UTC55m
2026-07-09 LXJ408 NUQ → VNY Jul 9, 17:15 UTCJul 9, 18:00 UTC45m
2026-07-07 LXJ408 - Jul 7, 21:55 UTCJul 7, 22:40 UTC45m
2026-07-07 LXJ408 LAS → VNY Jul 7, 18:40 UTCJul 7, 19:25 UTC45m
2026-07-07 LXJ408 VNY → LAS Jul 7, 14:40 UTCJul 7, 15:25 UTC45m
2026-07-06 LXJ408 - Jul 6, 22:05 UTCJul 6, 22:45 UTC40m
2026-07-06 LXJ408 - Jul 6, 17:40 UTCJul 6, 19:55 UTC2h 15m
2026-07-05 LXJ408 - Jul 5, 23:35 UTCJul 6, 01:00 UTC1h 25m
2026-07-05 LXJ408 - Jul 5, 20:20 UTCJul 5, 20:30 UTC10m
2026-07-05 LXJ408 - Jul 5, 17:25 UTCJul 5, 19:10 UTC1h 45m
2026-07-05 LXJ408 - Jul 5, 15:20 UTCJul 5, 16:40 UTC1h 20m
2026-06-27 LXJ408 - Jun 27, 14:45 UTCJun 27, 18:09 UTC3h 25m
2026-06-27 LXJ408 - Jun 27, 12:45 UTCJun 27, 13:15 UTC30m
2026-06-25 LXJ408 - Jun 25, 17:30 UTCJun 25, 18:15 UTC45m
2026-06-25 LXJ408 - Jun 25, 14:34 UTCJun 25, 16:14 UTC1h 40m
2026-06-25 LXJ408 - Jun 25, 12:30 UTCJun 25, 13:20 UTC50m
2026-06-25 LXJ408 - Jun 25, 10:50 UTCJun 25, 11:44 UTC55m
2026-06-24 LXJ408 - Jun 24, 21:04 UTCJun 24, 21:54 UTC50m
2026-06-24 LXJ408 - Jun 24, 18:25 UTCJun 24, 20:14 UTC1h 50m
2026-06-24 LXJ408 - Jun 24, 15:54 UTCJun 24, 16:45 UTC50m
2026-06-24 LXJ408 - Jun 24, 13:24 UTCJun 24, 14:29 UTC1h 5m
2026-06-23 LXJ408 - Jun 23, 18:50 UTCJun 23, 20:40 UTC1h 50m
2026-06-23 LXJ408 - Jun 23, 13:05 UTCJun 23, 14:19 UTC1h 15m
2026-06-21 LXJ408 - Jun 21, 20:05 UTCJun 21, 22:04 UTC2h 0m
2026-06-18 LXJ408 - Jun 18, 14:30 UTCJun 18, 14:40 UTC10m
2026-06-17 LXJ408 - Jun 17, 15:25 UTCJun 17, 22:40 UTC7h 15m
2026-06-17 LXJ408 - Jun 17, 13:05 UTCJun 17, 13:25 UTC20m
2026-06-16 LXJ408 - Jun 16, 22:40 UTCJun 16, 23:10 UTC30m
2026-06-16 LXJ408 - Jun 16, 19:19 UTCJun 16, 21:15 UTC1h 56m
2026-06-16 LXJ408 - Jun 16, 16:15 UTCJun 16, 17:40 UTC1h 25m
2026-06-15 LXJ408 - Jun 15, 20:54 UTCJun 15, 22:49 UTC1h 55m
2026-06-15 LXJ408 - Jun 15, 18:29 UTCJun 15, 19:35 UTC1h 5m
2026-06-14 LXJ408 - Jun 14, 23:44 UTCJun 15, 00:24 UTC40m
2026-06-14 LXJ408 SJC → BUF Jun 14, 18:50 UTCJun 14, 22:55 UTC4h 5m
2026-06-13 LXJ408 - Jun 13, 19:05 UTCJun 13, 20:50 UTC1h 45m
2026-06-13 LXJ408 - Jun 13, 16:05 UTCJun 13, 17:50 UTC1h 45m
2026-06-12 LXJ408 - Jun 12, 15:20 UTCJun 12, 17:05 UTC1h 45m
2026-06-12 LXJ408 - Jun 12, 13:05 UTCJun 12, 14:30 UTC1h 25m
2026-06-11 LXJ408 - Jun 11, 21:00 UTCJun 11, 22:45 UTC1h 45m
2026-06-11 LXJ408 - Jun 11, 15:35 UTCJun 11, 20:20 UTC4h 45m
2026-06-10 LXJ408 - Jun 10, 21:15 UTCJun 10, 21:55 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 N408FX page for operator, model, and routing details .

Mode-S A4CAEC frequently asked

What is Mode-S code A4CAEC?
A4CAEC is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N408FX.
Where is Mode-S A4CAEC registered?
Mode-S code A4CAEC 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 A4CAEC broadcasting right now?
No active broadcast right now. Last signal was 11h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A4CAEC, octal 51145354, decimal 10,799,852.
What flights does A4CAEC operate?
Mode-S A4CAEC has broadcast 1 distinct callsign, including LXJ408.