Apparatus

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sensors Mode-S transponder

AA2571

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N753CS · BOEING 757-200

Hex
AA2571
Octal
52422561
Decimal
11,150,705
Country
US
Tail
N753CS
Type
B752
No current signal · last broadcast 5h ago
Flights observed
104
Distinct callsigns
13
Country
US
Last broadcast
5h ago

Last known position

Most recent position reported by Mode-S AA2571.

Country allocation

The ICAO 24-bit address AA2571 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 13 distinct

Callsign Airline Flights Last seen
CSB594 - 21 2026-06-12
CSB585 - 19 2026-07-13
CSB194 21 Air 19 2026-06-13
CSB185 - 18 2026-07-14
CSB507 - 9 2026-06-17
CSB107 - 9 2026-06-18
CSB599 - 2 2026-07-11
CSB199 - 2 2026-07-11
CSB9101 - 1 2026-07-09
CSB2049 21 Air 1 2026-04-22
CSB2022 21 Air 1 2026-04-20
CSB2019 21 Air 1 2026-04-22
CSB2002 21 Air 1 2026-04-20

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 CSB185 MSP → CVG Jul 14, 02:45 UTCJul 14, 04:15 UTC1h 30m
2026-07-13 CSB585 - Jul 13, 06:10 UTCJul 13, 07:35 UTC1h 25m
2026-07-11 CSB199 - Jul 11, 15:30 UTCJul 11, 17:40 UTC2h 10m
2026-07-11 CSB599 - Jul 11, 08:20 UTCJul 11, 10:25 UTC2h 5m
2026-07-10 CSB199 - Jul 10, 15:20 UTCJul 10, 17:30 UTC2h 10m
2026-07-10 CSB599 - Jul 10, 08:20 UTCJul 10, 10:25 UTC2h 5m
2026-07-09 CSB9101 - Jul 9, 19:30 UTCJul 9, 21:05 UTC1h 35m
2026-06-18 CSB107 - Jun 18, 01:45 UTCJun 18, 04:20 UTC2h 35m
2026-06-17 CSB507 - Jun 17, 10:50 UTCJun 17, 13:20 UTC2h 30m
2026-06-17 CSB107 - Jun 17, 01:55 UTCJun 17, 04:21 UTC2h 25m
2026-06-16 CSB507 - Jun 16, 11:00 UTCJun 16, 13:55 UTC2h 55m
2026-06-16 CSB107 - Jun 16, 02:09 UTCJun 16, 04:30 UTC2h 20m
2026-06-15 CSB507 - Jun 15, 05:30 UTCJun 15, 07:55 UTC2h 25m
2026-06-13 CSB194 DEN → CVG Jun 13, 04:25 UTCJun 13, 06:25 UTC2h 0m
2026-06-13 CSB194 DEN → CVG Jun 13, 01:45 UTCJun 13, 02:40 UTC55m
2026-06-12 CSB594 DEN → SLC Jun 12, 16:50 UTCJun 12, 17:55 UTC1h 5m
2026-06-12 CSB594 - Jun 12, 12:10 UTCJun 12, 14:55 UTC2h 45m
2026-06-12 CSB194 DEN → CVG Jun 12, 04:10 UTCJun 12, 06:30 UTC2h 20m
2026-06-12 CSB194 DEN → CVG Jun 12, 01:40 UTCJun 12, 02:35 UTC55m
2026-06-11 CSB594 CVG → DEN Jun 11, 14:55 UTCJun 11, 16:00 UTC1h 5m
2026-06-11 CSB594 CVG → DEN Jun 11, 10:25 UTCJun 11, 13:00 UTC2h 35m
2026-06-11 CSB185 MSP → CVG Jun 11, 03:05 UTCJun 11, 04:45 UTC1h 40m
2026-06-10 CSB585 CVG → MSP Jun 10, 10:35 UTCJun 10, 12:15 UTC1h 40m
2026-06-10 CSB194 DEN → CVG Jun 10, 04:15 UTCJun 10, 06:30 UTC2h 15m
2026-06-10 CSB194 DEN → CVG Jun 10, 01:40 UTCJun 10, 02:35 UTC55m
2026-06-09 CSB594 CVG → DEN Jun 9, 14:35 UTCJun 9, 15:40 UTC1h 5m
2026-06-09 CSB594 CVG → DEN Jun 9, 10:35 UTCJun 9, 13:00 UTC2h 25m
2026-06-09 CSB194 DEN → CVG Jun 9, 05:10 UTCJun 9, 07:25 UTC2h 15m
2026-06-09 CSB194 DEN → CVG Jun 9, 02:20 UTCJun 9, 03:25 UTC1h 5m
2026-06-08 CSB594 CVG → DEN Jun 8, 10:40 UTCJun 8, 11:40 UTC1h 0m
2026-06-08 CSB594 CVG → DEN Jun 8, 06:40 UTCJun 8, 09:10 UTC2h 30m
2026-06-06 CSB185 MSP → CVG Jun 6, 02:25 UTCJun 6, 03:45 UTC1h 20m
2026-06-05 CSB585 CVG → MSP Jun 5, 10:30 UTCJun 5, 11:55 UTC1h 25m
2026-06-05 CSB185 MSP → CVG Jun 5, 02:35 UTCJun 5, 03:55 UTC1h 20m
2026-06-04 CSB585 CVG → MSP Jun 4, 10:40 UTCJun 4, 12:05 UTC1h 25m
2026-06-04 CSB185 MSP → CVG Jun 4, 02:45 UTCJun 4, 04:10 UTC1h 25m
2026-06-03 CSB585 CVG → MSP Jun 3, 10:35 UTCJun 3, 12:05 UTC1h 30m
2026-06-03 CSB185 MSP → CVG Jun 3, 02:25 UTCJun 3, 03:50 UTC1h 25m
2026-06-02 CSB585 CVG → MSP Jun 2, 10:35 UTCJun 2, 12:05 UTC1h 30m
2026-06-02 CSB185 MSP → CVG Jun 2, 02:40 UTCJun 2, 04:00 UTC1h 20m
2026-06-01 CSB585 CVG → MSP Jun 1, 06:45 UTCJun 1, 08:10 UTC1h 25m
2026-05-30 CSB107 HRL → CVG May 30, 02:06 UTCMay 30, 04:30 UTC2h 24m
2026-05-29 CSB507 CVG → HRL May 29, 11:15 UTCMay 29, 13:35 UTC2h 20m
2026-05-29 CSB107 HRL → CVG May 29, 02:15 UTCMay 29, 04:35 UTC2h 20m
2026-05-28 CSB507 CVG → HRL May 28, 11:05 UTCMay 28, 13:35 UTC2h 30m
2026-05-27 CSB107 HRL → CVG May 27, 03:50 UTCMay 27, 05:59 UTC2h 10m
2026-05-26 CSB507 CVG → HRL May 26, 10:44 UTCMay 26, 13:15 UTC2h 30m
2026-05-25 CSB107 HRL → CVG May 25, 08:50 UTCMay 25, 11:05 UTC2h 15m
2026-05-25 CSB507 CVG → HRL May 25, 04:20 UTCMay 25, 06:55 UTC2h 35m
2026-05-23 CSB594 CVG → DEN May 23, 03:40 UTCMay 23, 06:40 UTC3h 0m

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 N753CS page for operator, model, and routing details .

Mode-S AA2571 frequently asked

What is Mode-S code AA2571?
AA2571 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N753CS.
Where is Mode-S AA2571 registered?
Mode-S code AA2571 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 AA2571 broadcasting right now?
No active broadcast right now. Last signal was 5h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AA2571, octal 52422561, decimal 11,150,705.
What flights does AA2571 operate?
Mode-S AA2571 has broadcast 13 distinct callsigns, including CSB594, CSB585, CSB194, CSB185, CSB507.