Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A6E4E8

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N543UW · AIRBUS A-321 · operated by AMERICAN AIRLINES INC

Hex
A6E4E8
Octal
51562350
Decimal
10,937,576
Country
US
Tail
N543UW
Type
A321
Transponder active on ground
Flights observed
479
Distinct callsigns
20
Country
US
Last broadcast
Jul 24, 20:35 UTC

Last known position

Most recent position reported by Mode-S A6E4E8.

Country allocation

The ICAO 24-bit address A6E4E8 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 2026-06-14
AAL2305 American Airlines 7 2026-05-26
AAL402 - 5 2026-06-16
AAL3224 American Airlines 5 2026-04-13
AAL2328 American Airlines 5 2026-05-19
AAL2302 American Airlines 5 2026-05-15
AAL2041 - 5 2026-06-23
AAL1922 American Airlines 5 2026-06-11
AAL1793 American Airlines 5 2026-05-05
AAL1448 American Airlines 5 2026-05-31
AAL3139 American Airlines 4 2026-05-27
AAL2872 American Airlines 4 2026-07-21
AAL2629 - 4 2026-07-03
AAL2394 - 4 2026-07-06
AAL2343 American Airlines 4 2026-06-15
AAL1885 - 4 2026-07-17
AAL1565 American Airlines 4 2026-07-02
AAL1339 American Airlines 4 2026-04-20
AAL1312 - 4 2026-07-09
AAL1174 - 4 2026-06-12

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-24 AAL2665 SFO → DFW Jul 24, 19:15 UTCJul 24, 20:35 UTC1h 20m
2026-07-24 AAL2422 MIA → CUN Jul 24, 16:20 UTCJul 24, 17:40 UTC1h 20m
2026-07-24 AAL2422 MIA → CUN Jul 24, 16:16 UTCJul 24, 17:37 UTC1h 21m
2026-07-24 AAL3290 RDU → PHL Jul 24, 12:35 UTCJul 24, 14:55 UTC2h 20m
2026-07-24 AAL3290 RDU → PHL Jul 24, 12:31 UTCJul 24, 14:54 UTC2h 23m
2026-07-24 AAL2921 MIA → SAL Jul 24, 08:35 UTCJul 24, 10:00 UTC1h 25m
2026-07-24 AAL2921 MIA → SAL Jul 24, 08:32 UTCJul 24, 10:45 UTC2h 13m
2026-07-24 AAL2998 CLE → DFW Jul 24, 05:05 UTCJul 24, 07:20 UTC2h 15m
2026-07-23 AAL1577 ORD → DCA Jul 23, 22:35 UTCJul 24, 01:55 UTC3h 20m
2026-07-23 AAL1577 ORD → DCA Jul 23, 17:50 UTCJul 23, 21:05 UTC3h 15m
2026-07-23 AAL2521 YYC → DFW Jul 23, 12:59 UTCJul 23, 16:12 UTC3h 13m
2026-07-23 AAL2521 YYC → DFW Jul 23, 13:00 UTCJul 23, 16:10 UTC3h 10m
2026-07-23 AAL511 PHL → ORD Jul 23, 01:05 UTCJul 23, 04:25 UTC3h 20m
2026-07-22 AAL2613 SLC → DFW Jul 22, 20:55 UTCJul 22, 23:10 UTC2h 15m
2026-07-22 AAL2613 DFW → SLC Jul 22, 17:20 UTCJul 22, 19:30 UTC2h 10m
2026-07-22 AAL1018 - Jul 22, 13:25 UTCJul 22, 15:20 UTC1h 55m
2026-07-21 AAL2820 PHL → PHX Jul 21, 14:35 UTCJul 21, 19:00 UTC4h 25m
2026-07-21 AAL2820 PHL → PHX Jul 21, 14:34 UTCJul 21, 19:00 UTC4h 26m
2026-07-21 AAL437 LAS → PHL Jul 21, 08:55 UTCJul 21, 13:15 UTC4h 20m
2026-07-21 AAL2872 MCO → DFW Jul 21, 05:30 UTCJul 21, 07:40 UTC2h 10m
2026-07-21 AAL2872 MCO → DFW Jul 21, 05:28 UTCJul 21, 07:36 UTC2h 8m
2026-07-21 AAL1832 DEN → DFW Jul 21, 01:40 UTCJul 21, 03:10 UTC1h 30m
2026-07-20 AAL1832 DEN → DFW Jul 20, 22:10 UTCJul 20, 23:40 UTC1h 30m
2026-07-20 AAL415 PHL → DFW Jul 20, 17:10 UTCJul 20, 20:00 UTC2h 50m
2026-07-20 AAL415 DFW → PHL Jul 20, 12:55 UTCJul 20, 15:50 UTC2h 55m
2026-07-19 AAL2287 AUS → JFK Jul 19, 23:30 UTCJul 20, 03:05 UTC3h 35m
2026-07-19 AAL2287 - Jul 19, 14:40 UTCJul 19, 18:00 UTC3h 20m
2026-07-19 AAL700 IAH → DFW Jul 19, 11:10 UTCJul 19, 11:55 UTC45m
2026-07-19 AAL700 IAH → DFW Jul 19, 11:08 UTCJul 19, 11:53 UTC45m
2026-07-19 AAL1840 CLT → IAH Jul 19, 01:45 UTCJul 19, 03:40 UTC1h 55m
2026-07-19 AAL1840 CLT → IAH Jul 19, 01:43 UTCJul 19, 03:40 UTC1h 57m
2026-07-18 AAL793 - Jul 18, 23:15 UTCJul 19, 00:25 UTC1h 10m
2026-07-18 AAL2947 DFW → PHL Jul 18, 17:25 UTCJul 18, 20:40 UTC3h 15m
2026-07-18 AAL1025 - Jul 18, 14:15 UTCJul 18, 16:05 UTC1h 50m
2026-07-18 AAL1207 - Jul 18, 01:00 UTCJul 18, 02:55 UTC1h 56m
2026-07-17 AAL1885 - Jul 17, 20:00 UTCJul 17, 23:00 UTC3h 0m
2026-07-17 AAL1885 - Jul 17, 15:25 UTCJul 17, 18:25 UTC3h 0m
2026-07-17 AAL1171 - Jul 17, 11:30 UTCJul 17, 13:35 UTC2h 5m
2026-07-17 AAL2263 CLT → ALB Jul 17, 00:40 UTCJul 17, 02:34 UTC1h 55m
2026-07-17 AAL2263 CLT → ALB Jul 17, 00:37 UTCJul 17, 02:33 UTC1h 56m
2026-07-16 AAL1629 - Jul 16, 20:00 UTCJul 16, 22:49 UTC2h 50m
2026-07-16 AAL1629 DFW → BWI Jul 16, 16:19 UTCJul 16, 18:55 UTC2h 35m
2026-07-16 AAL1403 - Jul 16, 11:34 UTCJul 16, 14:10 UTC2h 35m
2026-07-16 AAL1403 BWI → DFW Jul 16, 11:31 UTCJul 16, 14:10 UTC2h 39m
2026-07-16 AAL2251 - Jul 16, 01:40 UTCJul 16, 04:15 UTC2h 35m
2026-07-15 AAL1595 - Jul 15, 20:30 UTCJul 15, 23:55 UTC3h 25m
2026-07-15 AAL1595 - Jul 15, 15:40 UTCJul 15, 19:05 UTC3h 25m
2026-07-15 AAL2575 - Jul 15, 11:05 UTCJul 15, 13:45 UTC2h 40m
2026-07-15 AAL1576 - Jul 15, 00:15 UTCJul 15, 02:40 UTC2h 25m
2026-07-15 AAL1576 LGA → MIA Jul 15, 00:13 UTCJul 15, 02:37 UTC2h 24m

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 N543UW page for operator, model, and routing details .

Mode-S A6E4E8 frequently asked

What is Mode-S code A6E4E8?
A6E4E8 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N543UW.
Where is Mode-S A6E4E8 registered?
Mode-S code A6E4E8 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 A6E4E8 broadcasting right now?
Mode-S A6E4E8 is currently broadcasting from the ground.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A6E4E8, octal 51562350, decimal 10,937,576.
What flights does A6E4E8 operate?
Mode-S A6E4E8 has broadcast 20 distinct callsigns, including AAL3001, AAL2305, AAL402, AAL3224, AAL2328.