Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A2ABA2

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N271QS · EMBRAER EMB545 Praetor 500 · operated by AMPRO AVIATION LLC, BANK OF UTAH TRUSTEE, COLLINS OPERATING LLC, POWERS GREGG J, GYA MANAGEMENT LLC, MAKI TRAVELS LLC

Hex
A2ABA2
Octal
50525642
Decimal
10,660,770
Country
US
Tail
N271QS
Type
E545
No current signal · last broadcast 12d ago
Flights observed
52
Distinct callsigns
2
Country
US
Last broadcast
12d ago

Last known position

Most recent position reported by Mode-S A2ABA2.

Country allocation

The ICAO 24-bit address A2ABA2 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
EJA271 NetJets 48 2026-05-21
N271QS - 4 2026-05-19

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-21 EJA271 SDF → RDU May 21, 13:25 UTCMay 21, 14:15 UTC50m
2026-05-21 EJA271 SDF → RDU May 21, 12:00 UTCMay 21, 12:30 UTC30m
2026-05-20 EJA271 SDF → RDU May 20, 21:25 UTCMay 20, 22:55 UTC1h 30m
2026-05-20 EJA271 SDF → RDU May 20, 17:05 UTCMay 20, 20:10 UTC3h 5m
2026-05-20 EJA271 SDF → RDU May 20, 13:45 UTCMay 20, 15:15 UTC1h 30m
2026-05-19 N271QS - May 19, 19:55 UTCMay 19, 20:35 UTC40m
2026-05-19 N271QS - May 19, 14:15 UTCMay 19, 15:40 UTC1h 25m
2026-05-18 EJA271 SDF → RDU May 18, 22:00 UTCMay 19, 00:00 UTC2h 0m
2026-05-18 EJA271 SDF → RDU May 18, 18:20 UTCMay 18, 18:55 UTC34m
2026-05-18 EJA271 SDF → RDU May 18, 14:25 UTCMay 18, 17:25 UTC3h 0m
2026-05-17 EJA271 SDF → RDU May 17, 19:05 UTCMay 17, 22:35 UTC3h 30m
2026-05-17 EJA271 SDF → RDU May 17, 15:05 UTCMay 17, 16:45 UTC1h 40m
2026-05-16 EJA271 SDF → RDU May 16, 19:50 UTCMay 16, 21:10 UTC1h 20m
2026-05-16 EJA271 SDF → RDU May 16, 16:40 UTCMay 16, 18:20 UTC1h 40m
2026-05-16 EJA271 SDF → RDU May 16, 00:00 UTCMay 16, 00:25 UTC25m
2026-05-15 EJA271 SDF → RDU May 15, 17:50 UTCMay 15, 22:20 UTC4h 30m
2026-05-12 EJA271 SDF → RDU May 12, 02:45 UTCMay 12, 03:10 UTC25m
2026-05-11 EJA271 SDF → RDU May 11, 20:25 UTCMay 11, 20:30 UTC5m
2026-05-11 EJA271 SDF → RDU May 11, 13:25 UTCMay 11, 19:35 UTC6h 11m
2026-05-10 EJA271 SDF → RDU May 10, 20:50 UTCMay 10, 21:30 UTC40m
2026-05-10 EJA271 SDF → RDU May 10, 18:05 UTCMay 10, 18:49 UTC45m
2026-05-10 EJA271 SDF → RDU May 10, 13:49 UTCMay 10, 15:35 UTC1h 45m
2026-05-09 EJA271 SDF → RDU May 9, 15:55 UTCMay 9, 16:25 UTC30m
2026-05-09 N271QS - May 9, 13:40 UTCMay 9, 14:20 UTC40m
2026-05-07 N271QS - May 7, 20:15 UTCMay 7, 20:30 UTC15m
2026-05-07 EJA271 SDF → RDU May 7, 16:10 UTCMay 7, 18:45 UTC2h 35m
2026-05-06 EJA271 SDF → RDU May 6, 16:50 UTCMay 6, 20:10 UTC3h 20m
2026-05-06 EJA271 SDF → RDU May 6, 14:35 UTCMay 6, 14:55 UTC20m
2026-05-02 EJA271 SDF → RDU May 2, 18:40 UTCMay 2, 20:25 UTC1h 45m
2026-05-02 EJA271 SDF → RDU May 2, 14:00 UTCMay 2, 17:35 UTC3h 35m
2026-05-02 EJA271 SDF → RDU May 2, 12:05 UTCMay 2, 12:55 UTC50m
2026-05-01 EJA271 SDF → RDU May 1, 20:50 UTCMay 1, 21:15 UTC25m
2026-05-01 EJA271 SDF → RDU May 1, 18:20 UTCMay 1, 19:30 UTC1h 10m
2026-05-01 EJA271 SDF → RDU May 1, 13:20 UTCMay 1, 17:30 UTC4h 10m
2026-04-30 EJA271 SDF → RDU Apr 30, 20:15 UTCApr 30, 21:25 UTC1h 10m
2026-04-30 EJA271 SDF → RDU Apr 30, 17:40 UTCApr 30, 18:30 UTC50m
2026-04-30 EJA271 SDF → RDU Apr 30, 13:30 UTCApr 30, 16:45 UTC3h 15m
2026-04-29 EJA271 SDF → RDU Apr 29, 20:20 UTCApr 29, 20:40 UTC20m
2026-04-26 EJA271 SDF → RDU Apr 26, 16:25 UTCApr 26, 17:40 UTC1h 15m
2026-04-24 EJA271 SDF → RDU Apr 24, 12:55 UTCApr 24, 13:55 UTC1h 0m
2026-04-23 EJA271 SDF → RDU Apr 23, 02:30 UTCApr 23, 04:30 UTC2h 0m
2026-04-23 EJA271 SDF → RDU Apr 23, 00:40 UTCApr 23, 00:50 UTC10m
2026-04-21 EJA271 SDF → RDU Apr 21, 15:45 UTCApr 21, 16:40 UTC55m
2026-04-20 EJA271 SDF → RDU Apr 20, 18:05 UTCApr 20, 19:55 UTC1h 50m
2026-04-19 EJA271 SDF → RDU Apr 19, 22:00 UTCApr 19, 22:50 UTC50m
2026-04-19 EJA271 SDF → RDU Apr 19, 19:35 UTCApr 19, 20:25 UTC50m
2026-04-19 EJA271 SDF → RDU Apr 19, 16:50 UTCApr 19, 18:45 UTC1h 55m
2026-04-16 EJA271 SDF → RDU Apr 16, 15:55 UTCApr 16, 16:30 UTC35m
2026-04-16 EJA271 SDF → RDU Apr 16, 01:10 UTCApr 16, 02:40 UTC1h 30m
2026-04-15 EJA271 SDF → RDU Apr 15, 21:20 UTCApr 15, 22:00 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 N271QS page for operator, model, and routing details .

Mode-S A2ABA2 frequently asked

What is Mode-S code A2ABA2?
A2ABA2 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N271QS.
Where is Mode-S A2ABA2 registered?
Mode-S code A2ABA2 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 A2ABA2 broadcasting right now?
No active broadcast right now. Last signal was 12d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A2ABA2, octal 50525642, decimal 10,660,770.
What flights does A2ABA2 operate?
Mode-S A2ABA2 has broadcast 2 distinct callsigns, including EJA271, N271QS.