Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A1057A

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N165NN · AIRBUS A-321 · operated by AMERICAN AIRLINES INC

Hex
A1057A
Octal
50202572
Decimal
10,552,698
Country
US
Tail
N165NN
Type
A321
No current signal · last broadcast Jul 21, 06:40 UTC
Flights observed
514
Distinct callsigns
20
Country
US
Last broadcast
Jul 21, 06:40 UTC

Last known position

Most recent position reported by Mode-S A1057A.

Country allocation

The ICAO 24-bit address A1057A 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 20 distinct

Callsign Airline Flights Last seen
AAL1175 American Airlines 9 2026-04-25
AAL2611 - 6 2026-07-12
AAL2830 - 5 2026-07-17
AAL1738 American Airlines 5 2026-04-27
AAL757 American Airlines 4 2026-05-19
AAL559 - 4 2026-07-02
AAL420 American Airlines 4 2026-05-10
AAL2852 American Airlines 4 2026-05-15
AAL2668 American Airlines 4 2026-04-17
AAL2538 - 4 2026-07-16
AAL2486 American Airlines 4 2026-04-14
AAL2219 - 4 2026-07-05
AAL2033 American Airlines 4 2026-05-20
AAL2022 - 4 2026-07-16
AAL1996 American Airlines 4 2026-05-26
AAL1704 American Airlines 4 2026-06-12
AAL1281 - 4 2026-04-13
AAL542 - 3 2026-07-08
AAL458 - 3 2026-06-30
AAL353 American Airlines 3 2026-05-05

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-21 AAL1504 LAX → ORD Jul 21, 04:10 UTCJul 21, 06:40 UTC2h 30m
2026-07-21 AAL1322 DFW → DEN Jul 21, 00:45 UTCJul 21, 02:15 UTC1h 30m
2026-07-20 AAL1322 DFW → DEN Jul 20, 21:50 UTCJul 20, 23:20 UTC1h 30m
2026-07-20 AAL1584 DFW → LAS Jul 20, 17:50 UTCJul 20, 20:15 UTC2h 25m
2026-07-20 AAL1584 DFW → LAS Jul 20, 13:40 UTCJul 20, 15:55 UTC2h 15m
2026-07-19 AAL681 CUN → DFW Jul 19, 23:45 UTCJul 20, 02:05 UTC2h 20m
2026-07-19 AAL1507 DFW → CUN Jul 19, 20:20 UTCJul 19, 22:35 UTC2h 15m
2026-07-19 AAL2317 - Jul 19, 16:15 UTCJul 19, 18:55 UTC2h 40m
2026-07-19 AAL2766 - Jul 19, 00:10 UTCJul 19, 02:35 UTC2h 25m
2026-07-19 AAL2766 DFW → LAX Jul 19, 00:08 UTCJul 19, 02:35 UTC2h 27m
2026-07-18 AAL2320 - Jul 18, 20:50 UTCJul 18, 22:20 UTC1h 30m
2026-07-18 AAL2320 DFW → PNS Jul 18, 18:15 UTCJul 18, 19:40 UTC1h 25m
2026-07-18 AAL1021 BUF → DFW Jul 18, 13:49 UTCJul 18, 16:46 UTC2h 57m
2026-07-18 AAL1021 BUF → DFW Jul 18, 13:50 UTCJul 18, 16:50 UTC3h 0m
2026-07-18 AAL509 - Jul 18, 05:15 UTCJul 18, 08:15 UTC3h 0m
2026-07-18 AAL509 DFW → SMF Jul 18, 05:13 UTCJul 18, 08:11 UTC2h 58m
2026-07-18 AAL2387 - Jul 18, 00:04 UTCJul 18, 03:25 UTC3h 21m
2026-07-17 AAL2387 DFW → SFO Jul 17, 19:35 UTCJul 17, 22:45 UTC3h 10m
2026-07-17 AAL3055 - Jul 17, 15:29 UTCJul 17, 18:05 UTC2h 35m
2026-07-17 AAL3055 - Jul 17, 11:10 UTCJul 17, 13:45 UTC2h 35m
2026-07-17 AAL2742 - Jul 17, 06:54 UTCJul 17, 09:35 UTC2h 40m
2026-07-17 AAL2742 - Jul 17, 05:10 UTCJul 17, 05:25 UTC15m
2026-07-17 AAL2830 - Jul 17, 03:25 UTCJul 17, 03:45 UTC20m
2026-07-17 AAL2830 - Jul 17, 00:30 UTCJul 17, 01:49 UTC1h 20m
2026-07-17 AAL2830 CLT → SJU Jul 17, 00:28 UTCJul 17, 03:39 UTC3h 11m
2026-07-16 AAL1179 PUJ → CLT Jul 16, 18:47 UTCJul 16, 21:51 UTC3h 4m
2026-07-16 AAL1179 - Jul 16, 14:25 UTCJul 16, 21:45 UTC7h 20m
2026-07-16 AAL2538 TPA → CLT Jul 16, 11:39 UTCJul 16, 12:57 UTC1h 18m
2026-07-16 AAL2538 - Jul 16, 11:40 UTCJul 16, 12:55 UTC1h 15m
2026-07-16 AAL2022 - Jul 16, 00:55 UTCJul 16, 02:10 UTC1h 15m
2026-07-16 AAL2022 CLT → TPA Jul 16, 00:49 UTCJul 16, 02:07 UTC1h 18m
2026-07-15 AAL1085 MBJ → CLT Jul 15, 19:52 UTCJul 15, 22:25 UTC2h 33m
2026-07-15 AAL1085 - Jul 15, 15:50 UTCJul 15, 22:30 UTC6h 40m
2026-07-15 AAL1002 - Jul 15, 12:10 UTCJul 15, 13:55 UTC1h 45m
2026-07-15 AAL1002 MSN → CLT Jul 15, 12:06 UTCJul 15, 13:45 UTC1h 39m
2026-07-15 AAL1426 - Jul 15, 02:50 UTCJul 15, 04:20 UTC1h 30m
2026-07-15 AAL1426 CLT → MSN Jul 15, 02:46 UTCJul 15, 04:15 UTC1h 29m
2026-07-14 AAL2444 - Jul 14, 23:55 UTCJul 15, 01:25 UTC1h 30m
2026-07-14 AAL2444 RSW → CLT Jul 14, 23:54 UTCJul 15, 01:28 UTC1h 34m
2026-07-14 AAL2444 - Jul 14, 21:25 UTCJul 14, 23:00 UTC1h 34m
2026-07-14 AAL1688 - Jul 14, 16:10 UTCJul 14, 19:50 UTC3h 40m
2026-07-14 AAL474 DFW → PHX Jul 14, 12:40 UTCJul 14, 14:40 UTC2h 0m
2026-07-14 AAL2003 SEA → DFW Jul 14, 07:10 UTCJul 14, 10:35 UTC3h 25m
2026-07-13 AAL2107 - Jul 13, 20:05 UTCJul 14, 00:50 UTC4h 45m
2026-07-13 AAL2074 - Jul 13, 17:30 UTCJul 13, 18:40 UTC1h 10m
2026-07-13 AAL2074 MCO → CLT Jul 13, 17:29 UTCJul 13, 18:41 UTC1h 12m
2026-07-13 AAL2074 - Jul 13, 14:55 UTCJul 13, 16:05 UTC1h 10m
2026-07-13 AAL2538 - Jul 13, 11:30 UTCJul 13, 12:40 UTC1h 10m
2026-07-13 AAL2538 TPA → CLT Jul 13, 11:28 UTCJul 13, 12:43 UTC1h 15m
2026-07-13 AAL2022 - Jul 13, 01:01 UTCJul 13, 02:30 UTC1h 30m

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 N165NN page for operator, model, and routing details .

Mode-S A1057A frequently asked

What is Mode-S code A1057A?
A1057A is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N165NN.
Where is Mode-S A1057A registered?
Mode-S code A1057A 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 A1057A broadcasting right now?
No active broadcast right now. Last signal was Jul 21, 06:40 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A1057A, octal 50202572, decimal 10,552,698.
What flights does A1057A operate?
Mode-S A1057A has broadcast 20 distinct callsigns, including AAL1175, AAL2611, AAL2830, AAL1738, AAL757.