Apparatus

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sensors Mode-S transponder

A9B43F

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N724UW · AIRBUS A-319 · operated by UMB BANK NA TRUSTEE

Hex
A9B43F
Octal
52332077
Decimal
11,121,727
Country
US
Tail
N724UW
Type
A319
Broadcasting now · callsign AAL2587 · 6,150 ft
Flights observed
620
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 16:20 UTC

Current position

A9B43F is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A9B43F 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
AAL2168 - 13 2026-07-19
AAL1572 American Airlines 9 2026-07-19
AAL557 American Airlines 7 2026-05-08
AAL2705 - 7 2026-07-20
AAL2021 American Airlines 7 2026-05-11
AAL2758 American Airlines 6 2026-05-14
AAL2276 American Airlines 6 2026-05-20
AAL2157 American Airlines 6 2026-07-23
AAL1589 - 6 2026-07-04
AAL327 American Airlines 5 2026-05-08
AAL3130 American Airlines 5 2026-06-13
AAL2987 - 5 2026-07-02
AAL2778 American Airlines 5 2026-07-20
AAL2773 - 5 2026-06-27
AAL2246 - 5 2026-07-17
AAL1031 American Airlines 5 2026-05-08
AAL865 American Airlines 4 2026-05-30
AAL3263 American Airlines 4 2026-05-29
AAL2957 American Airlines 4 2026-04-14
AAL2894 American Airlines 4 2026-07-19

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 AAL1666 PHX → ONT Jul 26, 15:45 UTCJul 26, 16:20 UTC35m
2026-07-26 AAL1666 PHX → ONT Jul 26, 14:00 UTCJul 26, 14:40 UTC40m
2026-07-25 AAL1510 CLT → EWR Jul 25, 23:50 UTCJul 26, 00:45 UTC55m
2026-07-25 AAL1505 SFO → JFK Jul 25, 21:00 UTCJul 25, 22:35 UTC1h 35m
2026-07-25 AAL2822 AUS → PHX Jul 25, 17:25 UTCJul 25, 19:30 UTC2h 5m
2026-07-25 AAL2822 AUS → PHX Jul 25, 13:10 UTCJul 25, 15:40 UTC2h 30m
2026-07-25 AAL1248 EWR → DFW Jul 25, 10:05 UTCJul 25, 10:55 UTC50m
2026-07-25 AAL2167 PVD → ORD Jul 25, 03:30 UTCJul 25, 05:00 UTC1h 30m
2026-07-24 AAL317G JAX → ORD Jul 24, 23:10 UTCJul 25, 01:30 UTC2h 20m
2026-07-24 AAL3135 ORD → SAV Jul 24, 20:15 UTCJul 24, 22:00 UTC1h 45m
2026-07-24 AAL3135 ORD → SAV Jul 24, 20:11 UTCJul 24, 21:59 UTC1h 48m
2026-07-24 AAL2447 SYR → DCA Jul 24, 17:35 UTCJul 24, 18:55 UTC1h 20m
2026-07-24 AAL2447 SYR → DCA Jul 24, 14:45 UTCJul 24, 16:00 UTC1h 15m
2026-07-24 AAL2951 CLT → SFO Jul 24, 12:15 UTCJul 24, 13:20 UTC1h 5m
2026-07-24 AAL2951 CLT → SFO Jul 24, 12:10 UTCJul 24, 13:19 UTC1h 9m
2026-07-24 AAL1889 MCO → PHX Jul 24, 01:35 UTCJul 24, 02:30 UTC55m
2026-07-23 AAL2157 DFW → MSY Jul 23, 21:40 UTCJul 23, 23:40 UTC2h 0m
2026-07-23 AAL2157 DFW → MSY Jul 23, 21:37 UTCJul 23, 23:46 UTC2h 9m
2026-07-23 AAL2157 DFW → MSY Jul 23, 18:05 UTCJul 23, 20:35 UTC2h 30m
2026-07-23 AAL1846 MEM → CLT Jul 23, 14:45 UTCJul 23, 15:35 UTC50m
2026-07-23 AAL1846 MEM → CLT Jul 23, 14:41 UTCJul 23, 15:31 UTC50m
2026-07-23 AAL1846 MEM → CLT Jul 23, 12:50 UTCJul 23, 13:50 UTC1h 0m
2026-07-23 AAL1846 MEM → CLT Jul 23, 12:25 UTCJul 23, 12:30 UTC5m
2026-07-23 AAL1147 PHX → MIA Jul 23, 01:15 UTCJul 23, 02:15 UTC1h 0m
2026-07-22 AAL1776 CLT → MSY Jul 22, 22:58 UTCJul 22, 23:56 UTC58m
2026-07-22 AAL1776 CLT → MSY Jul 22, 23:00 UTCJul 23, 00:00 UTC1h 0m
2026-07-22 AAL2208 MSY → PHL Jul 22, 17:40 UTCJul 22, 20:10 UTC2h 30m
2026-07-22 AAL2208 MSY → PHL Jul 22, 17:37 UTCJul 22, 20:05 UTC2h 28m
2026-07-21 AAL942 ABQ → DFW Jul 21, 13:15 UTCJul 21, 15:45 UTC2h 30m
2026-07-21 AAL942 ABQ → DFW Jul 21, 13:10 UTCJul 21, 15:36 UTC2h 26m
2026-07-21 AAL1248 EWR → DFW Jul 21, 10:25 UTCJul 21, 11:25 UTC1h 0m
2026-07-21 AAL1248 EWR → DFW Jul 21, 10:23 UTCJul 21, 11:22 UTC59m
2026-07-21 AAL2083 DCA → RDU Jul 21, 05:05 UTCJul 21, 05:48 UTC43m
2026-07-21 AAL2083 DCA → RDU Jul 21, 05:10 UTCJul 21, 05:50 UTC40m
2026-07-21 AAL1473 - Jul 21, 01:30 UTCJul 21, 02:05 UTC35m
2026-07-20 AAL834 - Jul 20, 22:15 UTCJul 21, 00:30 UTC2h 14m
2026-07-20 AAL2706 HAV → MIA Jul 20, 17:40 UTCJul 20, 18:05 UTC25m
2026-07-20 AAL2705 - Jul 20, 15:30 UTCJul 20, 16:00 UTC30m
2026-07-20 AAL2705 MIA → HAV Jul 20, 15:27 UTCJul 20, 16:22 UTC55m
2026-07-20 AAL2778 MSP → DFW Jul 20, 13:05 UTCJul 20, 13:40 UTC35m
2026-07-20 AAL2778 MSP → DFW Jul 20, 11:15 UTCJul 20, 11:55 UTC40m
2026-07-19 AAL1572 YYZ → MIA Jul 19, 23:55 UTCJul 20, 02:45 UTC2h 50m
2026-07-19 AAL1572 YYZ → MIA Jul 19, 19:00 UTCJul 19, 21:40 UTC2h 40m
2026-07-19 AAL2168 - Jul 19, 15:15 UTCJul 19, 17:15 UTC2h 0m
2026-07-19 AAL2168 HWO → MSY Jul 19, 12:20 UTCJul 19, 14:00 UTC1h 40m
2026-07-19 AAL2894 VPS → CLT Jul 19, 10:10 UTCJul 19, 10:55 UTC45m
2026-07-19 AAL1813 - Jul 19, 03:10 UTCJul 19, 03:40 UTC30m
2026-07-18 AAL2939 FLL → DCA Jul 18, 23:30 UTCJul 19, 01:30 UTC2h 0m
2026-07-18 AAL2939 FLL → DCA Jul 18, 20:40 UTCJul 18, 22:25 UTC1h 45m
2026-07-18 AAL1501 - Jul 18, 06:55 UTCJul 18, 08:45 UTC1h 50m

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 N724UW page for operator, model, and routing details .

Mode-S A9B43F frequently asked

What is Mode-S code A9B43F?
A9B43F is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N724UW.
Where is Mode-S A9B43F registered?
Mode-S code A9B43F 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 A9B43F broadcasting right now?
Yes. Mode-S A9B43F is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A9B43F, octal 52332077, decimal 11,121,727.
What flights does A9B43F operate?
Mode-S A9B43F has broadcast 20 distinct callsigns, including AAL2168, AAL1572, AAL557, AAL2705, AAL2021.