Apparatus

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sensors Mode-S transponder

AC40B3

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N889QS · operated by TEXTRON AVIATION INC

Hex
AC40B3
Octal
53040263
Decimal
11,288,755
Country
US
Tail
N889QS
Type
C700
No current signal · last broadcast 1d ago
Flights observed
21
Distinct callsigns
1
Country
US
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S AC40B3.

Country allocation

The ICAO 24-bit address AC40B3 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
EJA889 NetJets 21 2026-04-17

Recent flights last 21

DateFlightRouteTakeoffLandingDuration
2026-04-17 EJA889 IAH → SYR Apr 17, 01:20 UTCApr 17, 01:55 UTC35m
2026-04-17 EJA889 IAH → SYR Apr 17, 01:04 UTCApr 17, 01:15 UTC10m
2026-04-16 EJA889 IAH → SYR Apr 16, 23:20 UTCApr 17, 00:00 UTC40m
2026-04-16 EJA889 IAH → SYR Apr 16, 21:14 UTCApr 16, 23:10 UTC1h 55m
2026-04-16 EJA889 IAH → SYR Apr 16, 20:40 UTCApr 16, 21:10 UTC30m
2026-04-16 EJA889 IAH → SYR Apr 16, 19:15 UTCApr 16, 19:55 UTC40m
2026-04-16 EJA889 IAH → SYR Apr 16, 18:40 UTCApr 16, 19:10 UTC30m
2026-04-15 EJA889 IAH → SYR Apr 15, 21:05 UTCApr 15, 23:00 UTC1h 55m
2026-04-15 EJA889 IAH → SYR Apr 15, 19:05 UTCApr 15, 21:00 UTC1h 55m
2026-04-15 EJA889 IAH → SYR Apr 15, 18:10 UTCApr 15, 19:00 UTC50m
2026-04-15 EJA889 IAH → SYR Apr 15, 15:05 UTCApr 15, 15:25 UTC20m
2026-04-15 EJA889 IAH → SYR Apr 15, 14:01 UTCApr 15, 14:55 UTC54m
2026-04-15 EJA889 IAH → SYR Apr 15, 12:20 UTCApr 15, 12:50 UTC30m
2026-04-14 EJA889 IAH → SYR Apr 14, 20:55 UTCApr 14, 21:25 UTC30m
2026-04-14 EJA889 IAH → SYR Apr 14, 18:55 UTCApr 14, 20:50 UTC1h 55m
2026-04-14 EJA889 IAH → SYR Apr 14, 18:30 UTCApr 14, 18:45 UTC15m
2026-04-14 EJA889 IAH → SYR Apr 14, 16:50 UTCApr 14, 17:00 UTC10m
2026-04-14 EJA889 IAH → SYR Apr 14, 14:50 UTCApr 14, 15:20 UTC30m
2026-04-14 EJA889 IAH → SYR Apr 14, 14:35 UTCApr 14, 14:45 UTC10m
2026-04-14 EJA889 IAH → SYR Apr 14, 12:50 UTCApr 14, 13:00 UTC10m
2026-04-14 EJA889 IAH → SYR Apr 14, 12:25 UTCApr 14, 12:45 UTC20m

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 N889QS page for operator, model, and routing details .

Mode-S AC40B3 frequently asked

What is Mode-S code AC40B3?
AC40B3 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N889QS.
Where is Mode-S AC40B3 registered?
Mode-S code AC40B3 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 AC40B3 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 AC40B3, octal 53040263, decimal 11,288,755.
What flights does AC40B3 operate?
Mode-S AC40B3 has broadcast 1 distinct callsign, including EJA889.