Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A9D640

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N733AR · BOEING 777-300ER · operated by AMERICAN AIRLINES INC

Hex
A9D640
Octal
52353100
Decimal
11,130,432
Country
US
Tail
N733AR
Type
B77W
No current signal · last broadcast Jul 26, 22:00 UTC
Flights observed
259
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:00 UTC

Last known position

Most recent position reported by Mode-S A9D640.

Country allocation

The ICAO 24-bit address A9D640 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
AAL954 American Airlines 17 2026-07-22
AAL953 American Airlines 16 2026-07-21
AAL730 American Airlines 15 2026-07-24
AAL731 American Airlines 14 2026-07-24
AAL39 American Airlines 13 2026-06-08
AAL142 - 13 2026-07-22
AAL141 American Airlines 13 2026-07-20
AAL51 American Airlines 12 2026-07-25
AAL217 American Airlines 12 2026-07-26
AAL79 American Airlines 10 2026-07-05
AAL78 American Airlines 8 2026-07-20
AAL73 - 8 2026-06-26
AAL38 American Airlines 8 2026-06-11
AAL175 American Airlines 8 2026-06-03
AAL9600 American Airlines 7 2026-04-13
AAL930 American Airlines 7 2026-06-10
AAL72 American Airlines 7 2026-06-26
AAL216 American Airlines 7 2026-07-25
AAL176 American Airlines 7 2026-06-04
AAL81 - 6 2026-07-19

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 AAL217 CLT → AUS Jul 26, 11:51 UTCJul 27, 00:07 UTC12h 16m
2026-07-26 AAL217 CLT → AUS Jul 26, 11:55 UTCJul 26, 16:00 UTC4h 5m
2026-07-25 AAL216 SFO → DFW Jul 25, 21:15 UTCJul 26, 08:05 UTC10h 51m
2026-07-25 AAL51 LHR → DFW Jul 25, 08:10 UTCJul 25, 09:10 UTC1h 0m
2026-07-25 AAL51 LHR → DFW Jul 25, 08:08 UTCJul 25, 17:15 UTC9h 7m
2026-07-24 AAL730 CLT → LHR Jul 24, 22:20 UTCJul 25, 05:30 UTC7h 10m
2026-07-24 AAL730 CLT → LHR Jul 24, 22:18 UTCJul 25, 05:17 UTC6h 59m
2026-07-24 AAL731 LHR → CLT Jul 24, 08:50 UTCJul 24, 16:30 UTC7h 40m
2026-07-24 AAL731 LHR → CLT Jul 24, 08:48 UTCJul 24, 16:34 UTC7h 46m
2026-07-23 AAL730 CLT → LHR Jul 23, 22:25 UTCJul 24, 05:40 UTC7h 15m
2026-07-23 AAL730 CLT → LHR Jul 23, 22:21 UTCJul 24, 05:41 UTC7h 20m
2026-07-23 AAL731 - Jul 23, 09:10 UTCJul 23, 17:15 UTC8h 5m
2026-07-22 AAL142 JFK → LHR Jul 22, 13:54 UTCJul 22, 20:07 UTC6h 13m
2026-07-22 AAL142 - Jul 22, 13:55 UTCJul 22, 20:00 UTC6h 5m
2026-07-22 AAL954 EZE → JFK Jul 22, 00:20 UTCJul 22, 10:25 UTC10h 5m
2026-07-22 AAL954 EZE → JFK Jul 22, 00:15 UTCJul 22, 10:25 UTC10h 10m
2026-07-21 AAL953 JFK → EZE Jul 21, 04:00 UTCJul 21, 13:45 UTC9h 45m
2026-07-20 AAL141 LHR → JFK Jul 20, 17:35 UTCJul 21, 00:25 UTC6h 50m
2026-07-20 AAL78 DFW → LHR Jul 20, 05:00 UTCJul 20, 07:05 UTC2h 5m
2026-07-20 AAL78 DFW → LHR Jul 20, 04:57 UTCJul 20, 13:46 UTC8h 49m
2026-07-19 AAL81 - Jul 19, 16:50 UTCJul 20, 01:50 UTC9h 0m
2026-07-19 AAL81 LHR → DFW Jul 19, 16:46 UTCJul 20, 01:45 UTC8h 59m
2026-07-19 AAL78 DFW → LHR Jul 19, 04:55 UTCJul 19, 14:00 UTC9h 5m
2026-07-18 AAL217 CLT → AUS Jul 18, 13:15 UTCJul 18, 16:00 UTC2h 45m
2026-07-18 AAL217 CLT → AUS Jul 18, 13:13 UTCJul 19, 01:10 UTC11h 57m
2026-07-18 AAL217 CLT → AUS Jul 18, 13:13 UTCJul 19, 01:09 UTC11h 56m
2026-07-17 AAL216 DFW → ATH Jul 17, 22:10 UTCJul 18, 09:25 UTC11h 16m
2026-07-17 AAL51 LHR → DFW Jul 17, 08:32 UTCJul 17, 17:59 UTC9h 27m
2026-07-17 AAL51 LHR → DFW Jul 17, 08:35 UTCJul 17, 18:00 UTC9h 25m
2026-07-16 AAL142 - Jul 16, 13:54 UTCJul 16, 15:25 UTC1h 30m
2026-07-16 AAL142 JFK → LHR Jul 16, 13:53 UTCJul 16, 20:16 UTC6h 23m
2026-07-16 AAL954 - Jul 16, 00:20 UTCJul 16, 10:35 UTC10h 15m
2026-07-15 AAL953 JFK → EZE Jul 15, 03:30 UTCJul 15, 13:05 UTC9h 35m
2026-07-14 AAL954 - Jul 14, 00:25 UTCJul 14, 10:35 UTC10h 10m
2026-07-14 AAL954 EZE → JFK Jul 14, 00:23 UTCJul 14, 10:31 UTC10h 8m
2026-07-13 AAL953 - Jul 13, 03:40 UTCJul 13, 13:35 UTC9h 55m
2026-07-12 AAL141 - Jul 12, 18:01 UTCJul 13, 00:50 UTC6h 50m
2026-07-12 AAL78 DFW → LHR Jul 12, 06:20 UTCJul 12, 15:10 UTC8h 50m
2026-07-11 AAL217 ATH → DFW Jul 11, 12:20 UTCJul 12, 00:30 UTC12h 10m
2026-07-10 AAL216 DFW → ATH Jul 10, 21:25 UTCJul 11, 08:15 UTC10h 50m
2026-07-10 AAL51 - Jul 10, 08:10 UTCJul 10, 09:30 UTC1h 20m
2026-07-10 AAL51 LHR → DFW Jul 10, 08:10 UTCJul 10, 17:26 UTC9h 16m
2026-07-09 AAL142 JFK → LHR Jul 9, 13:50 UTCJul 9, 15:30 UTC1h 40m
2026-07-09 AAL142 JFK → LHR Jul 9, 13:47 UTCJul 9, 20:10 UTC6h 23m
2026-07-09 AAL954 - Jul 9, 00:25 UTCJul 9, 10:10 UTC9h 45m
2026-07-08 AAL953 - Jul 8, 03:40 UTCJul 8, 13:35 UTC9h 55m
2026-07-07 AAL141 - Jul 7, 17:30 UTCJul 8, 00:20 UTC6h 50m
2026-07-07 AAL141 LHR → JFK Jul 7, 17:26 UTCJul 8, 00:21 UTC6h 55m
2026-07-07 AAL734 - Jul 7, 04:25 UTCJul 7, 11:30 UTC7h 5m
2026-07-06 AAL735 AUA → LGA Jul 6, 14:30 UTCJul 6, 15:40 UTC1h 10m

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 N733AR page for operator, model, and routing details .

Mode-S A9D640 frequently asked

What is Mode-S code A9D640?
A9D640 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N733AR.
Where is Mode-S A9D640 registered?
Mode-S code A9D640 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 A9D640 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:00 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A9D640, octal 52353100, decimal 11,130,432.
What flights does A9D640 operate?
Mode-S A9D640 has broadcast 20 distinct callsigns, including AAL954, AAL953, AAL730, AAL731, AAL39.