Apparatus

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sensors Mode-S transponder

A9BEFC

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N727QS · BOMBARDIER BD-100 Challenger 350 · operated by NETJETS SALES INC, NETJETS AVIATION INC

Hex
A9BEFC
Octal
52337374
Decimal
11,124,476
Country
US
Tail
N727QS
Type
CL35
No current signal · last broadcast Apr 29, 02:05 UTC
Flights observed
31
Distinct callsigns
1
Country
US
Last broadcast
Apr 29, 02:05 UTC

Last known position

Most recent position reported by Mode-S A9BEFC.

Country allocation

The ICAO 24-bit address A9BEFC 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
EJA727 NetJets 31 2026-04-28

Recent flights last 31

DateFlightRouteTakeoffLandingDuration
2026-04-28 EJA727 TEB → MDW Apr 28, 23:00 UTCApr 29, 02:05 UTC3h 5m
2026-04-28 EJA727 TEB → MDW Apr 28, 16:45 UTCApr 28, 17:00 UTC15m
2026-04-26 EJA727 TEB → MDW Apr 26, 02:20 UTCApr 26, 03:45 UTC1h 25m
2026-04-22 EJA727 TEB → MDW Apr 22, 21:25 UTCApr 22, 22:50 UTC1h 25m
2026-04-22 EJA727 TEB → MDW Apr 22, 19:45 UTCApr 22, 20:00 UTC15m
2026-04-22 EJA727 TEB → MDW Apr 22, 16:00 UTCApr 22, 18:30 UTC2h 30m
2026-04-22 EJA727 TEB → MDW Apr 22, 12:45 UTCApr 22, 13:20 UTC35m
2026-04-22 EJA727 TEB → MDW Apr 22, 09:50 UTCApr 22, 11:45 UTC1h 55m
2026-04-21 EJA727 TEB → MDW Apr 21, 18:30 UTCApr 21, 19:10 UTC40m
2026-04-21 EJA727 TEB → MDW Apr 21, 17:05 UTCApr 21, 17:40 UTC35m
2026-04-21 EJA727 TEB → MDW Apr 21, 13:10 UTCApr 21, 15:35 UTC2h 25m
2026-04-20 EJA727 TEB → MDW Apr 20, 21:05 UTCApr 20, 21:40 UTC35m
2026-04-18 EJA727 TEB → MDW Apr 18, 22:25 UTCApr 19, 02:15 UTC3h 50m
2026-04-18 EJA727 TEB → MDW Apr 18, 19:55 UTCApr 18, 20:20 UTC25m
2026-04-18 EJA727 TEB → MDW Apr 18, 14:25 UTCApr 18, 18:20 UTC3h 55m
2026-04-17 EJA727 TEB → MDW Apr 17, 21:25 UTCApr 17, 23:10 UTC1h 45m
2026-04-17 EJA727 TEB → MDW Apr 17, 19:25 UTCApr 17, 19:50 UTC25m
2026-04-17 EJA727 TEB → MDW Apr 17, 18:45 UTCApr 17, 19:20 UTC35m
2026-04-17 EJA727 TEB → MDW Apr 17, 15:40 UTCApr 17, 17:10 UTC1h 30m
2026-04-16 EJA727 TEB → MDW Apr 16, 23:20 UTCApr 17, 01:15 UTC1h 55m
2026-04-16 EJA727 TEB → MDW Apr 16, 19:15 UTCApr 16, 21:00 UTC1h 45m
2026-04-16 EJA727 TEB → MDW Apr 16, 17:15 UTCApr 16, 19:10 UTC1h 55m
2026-04-16 EJA727 TEB → MDW Apr 16, 16:30 UTCApr 16, 17:10 UTC40m
2026-04-15 EJA727 TEB → MDW Apr 15, 21:05 UTCApr 15, 21:15 UTC10m
2026-04-15 EJA727 TEB → MDW Apr 15, 19:05 UTCApr 15, 21:00 UTC1h 55m
2026-04-15 EJA727 TEB → MDW Apr 15, 17:05 UTCApr 15, 19:00 UTC1h 55m
2026-04-15 EJA727 TEB → MDW Apr 15, 13:01 UTCApr 15, 14:40 UTC1h 40m
2026-04-15 EJA727 TEB → MDW Apr 15, 12:30 UTCApr 15, 12:55 UTC25m
2026-04-13 EJA727 TEB → MDW Apr 13, 12:20 UTCApr 13, 12:25 UTC5m
2026-04-13 EJA727 TEB → MDW Apr 13, 12:10 UTCApr 13, 12:15 UTC5m
2026-04-12 EJA727 TEB → MDW Apr 12, 17:15 UTCApr 12, 17:40 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 N727QS page for operator, model, and routing details .

Mode-S A9BEFC frequently asked

What is Mode-S code A9BEFC?
A9BEFC is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N727QS.
Where is Mode-S A9BEFC registered?
Mode-S code A9BEFC 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 A9BEFC broadcasting right now?
No active broadcast right now. Last signal was Apr 29, 02:05 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A9BEFC, octal 52337374, decimal 11,124,476.
What flights does A9BEFC operate?
Mode-S A9BEFC has broadcast 1 distinct callsign, including EJA727.