Apparatus

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sensors Mode-S transponder

A09533

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N137AA · AIRBUS A-321 · operated by AMERICAN AIRLINES INC

Hex
A09533
Octal
50112463
Decimal
10,523,955
Country
US
Tail
N137AA
Type
A321
No current signal · last broadcast Jul 26, 22:45 UTC
Flights observed
502
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:45 UTC

Last known position

Most recent position reported by Mode-S A09533.

Country allocation

The ICAO 24-bit address A09533 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
AAL3001 - 9 2026-06-26
AAL1565 - 6 2026-07-08
AAL3109 - 5 2026-07-17
AAL2786 American Airlines 5 2026-07-26
AAL2759 - 5 2026-06-24
AAL1979 American Airlines 5 2026-05-18
AAL1861 - 5 2026-07-06
AAL1625 American Airlines 5 2026-07-25
AAL1292 American Airlines 5 2026-07-03
AAL870 - 4 2026-07-13
AAL793 - 4 2026-06-30
AAL3195 American Airlines 4 2026-04-14
AAL2814 American Airlines 4 2026-05-09
AAL2604 - 4 2026-07-17
AAL2378 - 4 2026-06-27
AAL1919 American Airlines 4 2026-07-26
AAL1888 American Airlines 4 2026-04-17
AAL820 American Airlines 3 2026-07-22
AAL802 American Airlines 3 2026-04-23
AAL716 American Airlines 3 2026-06-01

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 AAL1919 PHL → MCO Jul 26, 21:25 UTCJul 26, 22:45 UTC1h 20m
2026-07-26 AAL1919 PHL → MCO Jul 26, 18:05 UTCJul 26, 20:00 UTC1h 55m
2026-07-26 AAL3009 EGE → DFW Jul 26, 13:10 UTCJul 26, 16:50 UTC3h 40m
2026-07-26 AAL2786 JFK → MIA Jul 26, 05:45 UTCJul 26, 08:45 UTC3h 1m
2026-07-26 AAL2786 JFK → MIA Jul 26, 05:43 UTCJul 26, 08:40 UTC2h 57m
2026-07-26 AAL3303 CMH → PHL Jul 26, 00:00 UTCJul 26, 03:20 UTC3h 20m
2026-07-25 AAL1625 PHX → PDX Jul 25, 20:45 UTCJul 25, 22:50 UTC2h 5m
2026-07-25 AAL1625 PHX → PDX Jul 25, 20:42 UTCJul 25, 22:57 UTC2h 15m
2026-07-25 AAL1282 PHL → LAX Jul 25, 14:55 UTCJul 25, 19:20 UTC4h 25m
2026-07-25 AAL2156 IAH → LGA Jul 25, 06:00 UTCJul 25, 10:20 UTC4h 20m
2026-07-25 AAL22Q LAS → PHX Jul 25, 03:55 UTCJul 25, 04:45 UTC50m
2026-07-24 AAL884 PHL → LAX Jul 24, 23:30 UTCJul 25, 01:55 UTC2h 25m
2026-07-24 AAL2647 LIT → CLT Jul 24, 16:15 UTCJul 24, 22:00 UTC5h 45m
2026-07-24 AAL1205 DFW → AUS Jul 24, 00:40 UTCJul 24, 05:00 UTC4h 20m
2026-07-23 AAL1673 PHL → MCO Jul 23, 21:05 UTCJul 23, 23:30 UTC2h 25m
2026-07-23 AAL2101 DCA → DFW Jul 23, 16:40 UTCJul 23, 18:45 UTC2h 5m
2026-07-23 AAL2101 DCA → DFW Jul 23, 13:00 UTCJul 23, 14:55 UTC1h 55m
2026-07-23 AAL3242 SMF → LAX Jul 23, 01:30 UTCJul 23, 04:15 UTC2h 45m
2026-07-23 AAL3242 SMF → LAX Jul 23, 01:29 UTCJul 23, 04:15 UTC2h 46m
2026-07-22 AAL820 DFW → ORD Jul 22, 20:30 UTCJul 23, 00:05 UTC3h 35m
2026-07-22 AAL1206 IND → PHL Jul 22, 15:35 UTCJul 22, 18:45 UTC3h 10m
2026-07-22 AAL1206 IND → PHL Jul 22, 15:31 UTCJul 22, 18:40 UTC3h 9m
2026-07-22 AAL2583 BNA → DFW Jul 22, 12:15 UTCJul 22, 13:50 UTC1h 35m
2026-07-22 AAL1644 MCO → DCA Jul 22, 04:55 UTCJul 22, 05:25 UTC30m
2026-07-22 AAL2976 BOS → DFW Jul 22, 02:15 UTCJul 22, 03:25 UTC1h 10m
2026-07-22 AAL2976 BOS → DFW Jul 22, 02:11 UTCJul 22, 03:22 UTC1h 11m
2026-07-21 AAL536 EWR → DFW Jul 21, 20:40 UTCJul 21, 22:50 UTC2h 10m
2026-07-21 AAL1952 LAX → CLT Jul 21, 14:35 UTCJul 21, 18:50 UTC4h 15m
2026-07-21 AAL2055 SFO → MIA Jul 21, 02:55 UTCJul 21, 07:00 UTC4h 5m
2026-07-20 AAL1067 - Jul 20, 20:40 UTCJul 20, 23:55 UTC3h 15m
2026-07-20 AAL823 UVF → CLT Jul 20, 14:50 UTCJul 20, 17:55 UTC3h 5m
2026-07-20 AAL1784 ORD → CLT Jul 20, 11:40 UTCJul 20, 13:05 UTC1h 25m
2026-07-20 AAL1784 ORD → CLT Jul 20, 11:40 UTCJul 20, 13:01 UTC1h 21m
2026-07-20 AAL1543 ORD → SAN Jul 20, 06:00 UTCJul 20, 09:30 UTC3h 30m
2026-07-20 AAL1243 DFW → SAN Jul 20, 01:40 UTCJul 20, 04:15 UTC2h 35m
2026-07-19 AAL2097 MCO → DFW Jul 19, 21:30 UTCJul 20, 00:00 UTC2h 30m
2026-07-19 AAL2097 - Jul 19, 17:50 UTCJul 19, 20:05 UTC2h 15m
2026-07-19 AAL2097 DFW → DFW Jul 19, 17:20 UTCJul 19, 17:25 UTC5m
2026-07-19 AAL1025 TUS → DFW Jul 19, 14:20 UTCJul 19, 16:05 UTC1h 45m
2026-07-19 AAL1025 TUS → DFW Jul 19, 14:15 UTCJul 19, 16:12 UTC1h 57m
2026-07-19 AAL1207 - Jul 19, 02:10 UTCJul 19, 04:00 UTC1h 50m
2026-07-18 AAL1629 ORD → CLT Jul 18, 21:50 UTCJul 19, 00:40 UTC2h 50m
2026-07-18 AAL1629 ORD → CLT Jul 18, 16:50 UTCJul 18, 19:50 UTC3h 0m
2026-07-18 AAL1090 DEN → DFW Jul 18, 13:40 UTCJul 18, 15:10 UTC1h 30m
2026-07-18 AAL2235 - Jul 18, 00:45 UTCJul 18, 02:14 UTC1h 30m
2026-07-17 AAL3109 - Jul 17, 20:25 UTCJul 17, 22:55 UTC2h 30m
2026-07-17 AAL3109 CZM → DFW Jul 17, 20:23 UTCJul 17, 22:52 UTC2h 29m
2026-07-17 AAL3109 - Jul 17, 16:49 UTCJul 17, 19:05 UTC2h 15m
2026-07-17 AAL2604 SLC → DFW Jul 17, 13:10 UTCJul 17, 15:15 UTC2h 5m
2026-07-17 AAL558 - Jul 17, 01:15 UTCJul 17, 03:30 UTC2h 15m

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 N137AA page for operator, model, and routing details .

Mode-S A09533 frequently asked

What is Mode-S code A09533?
A09533 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N137AA.
Where is Mode-S A09533 registered?
Mode-S code A09533 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 A09533 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:45 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A09533, octal 50112463, decimal 10,523,955.
What flights does A09533 operate?
Mode-S A09533 has broadcast 20 distinct callsigns, including AAL3001, AAL1565, AAL3109, AAL2786, AAL2759.