Apparatus

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sensors Mode-S transponder

A7A644

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N592QS · CESSNA 560XL Citation XLS · operated by NETJETS SALES INC

Hex
A7A644
Octal
51723104
Decimal
10,987,076
Country
US
Tail
N592QS
Type
C56X
Broadcasting now · callsign EJA592 · 40,000 ft
Flights observed
90
Distinct callsigns
2
Country
US
Last broadcast
24m ago

Current position

A7A644 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A7A644 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
EJA592 NetJets 86 2026-06-15
N592QS - 4 2026-06-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-15 EJA592 AUS → DAL Jun 15, 18:25 UTCJun 15, 19:00 UTC35m
2026-06-15 EJA592 AUS → DAL Jun 15, 16:04 UTCJun 15, 17:30 UTC1h 25m
2026-06-15 EJA592 AUS → DAL Jun 15, 14:10 UTCJun 15, 15:15 UTC1h 5m
2026-06-15 EJA592 AUS → DAL Jun 15, 12:30 UTCJun 15, 13:30 UTC1h 0m
2026-06-14 N592QS - Jun 14, 16:45 UTCJun 14, 21:25 UTC4h 40m
2026-06-14 EJA592 AUS → DAL Jun 14, 13:25 UTCJun 14, 15:55 UTC2h 30m
2026-06-13 EJA592 AUS → DAL Jun 13, 18:40 UTCJun 13, 20:10 UTC1h 30m
2026-06-13 EJA592 AUS → DAL Jun 13, 16:00 UTCJun 13, 17:35 UTC1h 35m
2026-06-13 EJA592 AUS → DAL Jun 13, 13:40 UTCJun 13, 15:10 UTC1h 30m
2026-06-13 EJA592 AUS → DAL Jun 13, 11:35 UTCJun 13, 12:10 UTC35m
2026-06-12 EJA592 AUS → DAL Jun 12, 19:20 UTCJun 12, 21:25 UTC2h 5m
2026-06-12 EJA592 AUS → DAL Jun 12, 17:05 UTCJun 12, 17:15 UTC10m
2026-06-12 EJA592 AUS → DAL Jun 12, 14:01 UTCJun 12, 15:20 UTC1h 20m
2026-06-12 EJA592 AUS → DAL Jun 12, 11:45 UTCJun 12, 12:55 UTC1h 10m
2026-06-11 EJA592 AUS → DAL Jun 11, 19:05 UTCJun 11, 21:05 UTC2h 0m
2026-06-11 EJA592 AUS → DAL Jun 11, 15:55 UTCJun 11, 16:10 UTC15m
2026-06-11 EJA592 AUS → DAL Jun 11, 14:20 UTCJun 11, 14:55 UTC35m
2026-06-11 EJA592 AUS → DAL Jun 11, 12:30 UTCJun 11, 13:15 UTC45m
2026-06-10 EJA592 AUS → DAL Jun 10, 22:00 UTCJun 10, 22:45 UTC45m
2026-06-08 EJA592 AUS → DAL Jun 8, 00:05 UTCJun 8, 02:15 UTC2h 10m
2026-06-07 EJA592 AUS → DAL Jun 7, 22:30 UTCJun 7, 23:15 UTC45m
2026-06-07 EJA592 AUS → DAL Jun 7, 20:15 UTCJun 7, 21:25 UTC1h 10m
2026-06-04 EJA592 AUS → DAL Jun 4, 15:30 UTCJun 4, 17:05 UTC1h 35m
2026-06-03 EJA592 AUS → DAL Jun 3, 21:05 UTCJun 4, 17:05 UTC20h 0m
2026-06-03 EJA592 AUS → DAL Jun 3, 14:45 UTCJun 3, 16:50 UTC2h 5m
2026-06-03 EJA592 AUS → DAL Jun 3, 12:50 UTCJun 3, 13:50 UTC1h 0m
2026-06-02 EJA592 AUS → DAL Jun 2, 01:25 UTCJun 2, 03:30 UTC2h 5m
2026-06-01 EJA592 AUS → DAL Jun 1, 21:55 UTCJun 1, 22:10 UTC15m
2026-06-01 EJA592 AUS → DAL Jun 1, 20:45 UTCJun 1, 21:20 UTC35m
2026-06-01 EJA592 AUS → DAL Jun 1, 16:55 UTCJun 1, 17:20 UTC25m
2026-06-01 EJA592 AUS → DAL Jun 1, 14:40 UTCJun 1, 15:50 UTC1h 10m
2026-05-31 EJA592 AUS → DAL May 31, 22:35 UTCJun 1, 00:05 UTC1h 30m
2026-05-31 EJA592 AUS → DAL May 31, 20:55 UTCMay 31, 21:35 UTC40m
2026-05-31 EJA592 AUS → DAL May 31, 17:20 UTCMay 31, 19:25 UTC2h 5m
2026-05-31 EJA592 AUS → DAL May 31, 15:15 UTCMay 31, 16:20 UTC1h 5m
2026-05-30 EJA592 AUS → DAL May 30, 22:50 UTCMay 30, 23:45 UTC55m
2026-05-30 EJA592 AUS → DAL May 30, 20:25 UTCMay 30, 21:30 UTC1h 5m
2026-05-30 EJA592 AUS → DAL May 30, 19:15 UTCMay 30, 19:40 UTC25m
2026-05-30 EJA592 AUS → DAL May 30, 16:55 UTCMay 30, 17:30 UTC35m
2026-05-18 EJA592 AUS → DAL May 18, 16:15 UTCMay 18, 21:45 UTC5h 29m
2026-05-18 EJA592 AUS → DAL May 18, 01:50 UTCMay 18, 02:55 UTC1h 5m
2026-05-17 EJA592 AUS → DAL May 17, 23:40 UTCMay 18, 00:20 UTC40m
2026-05-17 EJA592 AUS → DAL May 17, 21:01 UTCMay 17, 22:05 UTC1h 5m
2026-05-17 EJA592 AUS → DAL May 17, 17:50 UTCMay 17, 19:15 UTC1h 25m
2026-05-17 EJA592 AUS → DAL May 17, 04:10 UTCMay 17, 05:05 UTC55m
2026-05-17 EJA592 AUS → DAL May 17, 00:55 UTCMay 17, 03:05 UTC2h 10m
2026-05-16 EJA592 AUS → DAL May 16, 22:45 UTCMay 16, 23:50 UTC1h 5m
2026-05-16 EJA592 AUS → DAL May 16, 19:25 UTCMay 16, 20:25 UTC1h 0m
2026-05-15 EJA592 AUS → DAL May 15, 19:35 UTCMay 15, 20:30 UTC55m
2026-05-15 EJA592 AUS → DAL May 15, 17:20 UTCMay 15, 18:25 UTC1h 5m

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 N592QS page for operator, model, and routing details .

Mode-S A7A644 frequently asked

What is Mode-S code A7A644?
A7A644 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N592QS.
Where is Mode-S A7A644 registered?
Mode-S code A7A644 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 A7A644 broadcasting right now?
Yes. Mode-S A7A644 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A7A644, octal 51723104, decimal 10,987,076.
What flights does A7A644 operate?
Mode-S A7A644 has broadcast 2 distinct callsigns, including EJA592, N592QS.