Apparatus

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sensors Mode-S transponder

A272EE

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N257QS · BOMBARDIER CL-600 Challenger · operated by NETJETS SALES INC, ABRAMS NJ LLC, DAVENPORT BEN TRUSTEE, ZHANG LUCY C TRUSTEE, BLUE SKIES AVIATION SERVICES LLC, CFHSEATTLE LLC

Hex
A272EE
Octal
50471356
Decimal
10,646,254
Country
US
Tail
N257QS
Type
CL60
No current signal · last broadcast Jul 26, 07:00 UTC
Flights observed
176
Distinct callsigns
2
Country
US
Last broadcast
Jul 26, 07:00 UTC

Last known position

Most recent position reported by Mode-S A272EE.

Country allocation

The ICAO 24-bit address A272EE 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 2 distinct

Callsign Airline Flights Last seen
EJA257 NetJets 153 2026-07-26
N257QS - 23 2026-06-20

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 EJA257 MDW → SCF Jul 26, 02:45 UTCJul 26, 06:55 UTC4h 11m
2026-07-25 EJA257 MDW → SCF Jul 25, 17:36 UTCJul 25, 18:18 UTC42m
2026-07-25 EJA257 MDW → SCF Jul 25, 16:35 UTCJul 25, 17:20 UTC45m
2026-07-25 EJA257 MDW → SCF Jul 25, 14:10 UTCJul 25, 15:20 UTC1h 10m
2026-07-25 EJA257 MDW → SCF Jul 25, 10:30 UTCJul 25, 11:20 UTC50m
2026-07-24 EJA257 MDW → SCF Jul 24, 19:20 UTCJul 24, 20:05 UTC45m
2026-07-24 EJA257 MDW → SCF Jul 24, 16:55 UTCJul 24, 17:25 UTC30m
2026-07-24 EJA257 MDW → SCF Jul 24, 15:25 UTCJul 24, 15:50 UTC25m
2026-07-24 EJA257 MDW → SCF Jul 24, 14:10 UTCJul 24, 14:30 UTC20m
2026-07-24 EJA257 MDW → SCF Jul 24, 12:15 UTCJul 24, 13:00 UTC45m
2026-07-23 EJA257 MDW → SCF Jul 23, 20:45 UTCJul 23, 22:00 UTC1h 15m
2026-07-23 EJA257 MDW → SCF Jul 23, 18:00 UTCJul 23, 18:45 UTC45m
2026-07-23 EJA257 MDW → SCF Jul 23, 16:05 UTCJul 23, 16:55 UTC50m
2026-07-23 EJA257 MDW → SCF Jul 23, 12:55 UTCJul 23, 14:10 UTC1h 15m
2026-07-22 EJA257 MDW → SCF Jul 22, 15:10 UTCJul 22, 23:35 UTC8h 25m
2026-07-22 EJA257 MDW → SCF Jul 22, 13:25 UTCJul 22, 13:40 UTC15m
2026-07-21 EJA257 MDW → SCF Jul 21, 17:15 UTCJul 21, 21:55 UTC4h 40m
2026-07-21 EJA257 MDW → SCF Jul 21, 13:35 UTCJul 21, 14:45 UTC1h 10m
2026-07-20 EJA257 MDW → SCF Jul 20, 22:35 UTCJul 20, 23:35 UTC1h 0m
2026-07-20 EJA257 MDW → SCF Jul 20, 20:55 UTCJul 20, 21:15 UTC20m
2026-07-20 EJA257 MDW → SCF Jul 20, 17:10 UTCJul 20, 18:45 UTC1h 35m
2026-07-20 EJA257 MDW → SCF Jul 20, 14:50 UTCJul 20, 16:00 UTC1h 10m
2026-07-17 EJA257 MDW → SCF Jul 17, 23:45 UTCJul 18, 00:25 UTC40m
2026-07-17 EJA257 MDW → SCF Jul 17, 22:10 UTCJul 17, 22:35 UTC25m
2026-07-17 EJA257 MDW → SCF Jul 17, 20:00 UTCJul 17, 20:50 UTC50m
2026-07-17 EJA257 MDW → SCF Jul 17, 16:34 UTCJul 17, 17:15 UTC40m
2026-07-09 EJA257 - Jul 9, 19:45 UTCJul 9, 23:50 UTC4h 5m
2026-07-09 EJA257 - Jul 9, 15:45 UTCJul 9, 17:55 UTC2h 10m
2026-07-06 EJA257 - Jul 6, 23:40 UTCJul 7, 00:40 UTC1h 0m
2026-07-06 EJA257 - Jul 6, 19:55 UTCJul 6, 22:35 UTC2h 40m
2026-07-06 EJA257 SJC → MEV Jul 6, 17:55 UTCJul 6, 18:30 UTC35m
2026-07-05 EJA257 SJC → SJC Jul 5, 18:25 UTCJul 5, 19:45 UTC1h 20m
2026-06-27 EJA257 - Jun 27, 16:04 UTCJun 27, 20:09 UTC4h 5m
2026-06-27 EJA257 TEB → STL Jun 27, 12:34 UTCJun 27, 14:45 UTC2h 10m
2026-06-26 EJA257 - Jun 26, 17:44 UTCJun 26, 22:14 UTC4h 30m
2026-06-26 EJA257 - Jun 26, 13:55 UTCJun 26, 16:44 UTC2h 50m
2026-06-23 EJA257 - Jun 23, 23:10 UTCJun 24, 00:59 UTC1h 50m
2026-06-23 EJA257 - Jun 23, 21:45 UTCJun 23, 22:10 UTC25m
2026-06-23 EJA257 - Jun 23, 17:34 UTCJun 23, 19:29 UTC1h 55m
2026-06-23 EJA257 - Jun 23, 14:44 UTCJun 23, 16:20 UTC1h 35m
2026-06-22 EJA257 - Jun 22, 21:54 UTCJun 22, 23:10 UTC1h 15m
2026-06-22 EJA257 - Jun 22, 18:09 UTCJun 22, 21:05 UTC2h 55m
2026-06-22 EJA257 - Jun 22, 16:40 UTCJun 22, 17:15 UTC35m
2026-06-20 N257QS - Jun 20, 21:55 UTCJun 21, 01:10 UTC3h 15m
2026-06-20 N257QS - Jun 20, 15:14 UTCJun 20, 20:05 UTC4h 50m
2026-06-19 EJA257 LAS → SLC Jun 19, 23:54 UTCJun 20, 00:44 UTC50m
2026-06-19 EJA257 - Jun 19, 20:44 UTCJun 19, 23:00 UTC2h 15m
2026-06-19 EJA257 - Jun 19, 16:49 UTCJun 19, 18:39 UTC1h 50m
2026-06-18 EJA257 - Jun 18, 23:50 UTCJun 19, 00:49 UTC59m
2026-06-18 EJA257 - Jun 18, 20:15 UTCJun 18, 21:00 UTC45m

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 N257QS page for operator, model, and routing details .

Mode-S A272EE frequently asked

What is Mode-S code A272EE?
A272EE is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N257QS.
Where is Mode-S A272EE registered?
Mode-S code A272EE 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 A272EE broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 07:00 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A272EE, octal 50471356, decimal 10,646,254.
What flights does A272EE operate?
Mode-S A272EE has broadcast 2 distinct callsigns, including EJA257, N257QS.