Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A6D3B3

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N539UW · AIRBUS A-321 · operated by AMERICAN AIRLINES INC

Hex
A6D3B3
Octal
51551663
Decimal
10,933,171
Country
US
Tail
N539UW
Type
A321
No current signal · last broadcast Jul 26, 22:45 UTC
Flights observed
528
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:45 UTC

Last known position

Most recent position reported by Mode-S A6D3B3.

Country allocation

The ICAO 24-bit address A6D3B3 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
AAL3024 American Airlines 7 2026-05-08
AAL2763 American Airlines 7 2026-04-15
AAL3214 American Airlines 6 2026-05-19
AAL611 American Airlines 5 2026-06-20
AAL3234 American Airlines 5 2026-04-16
AAL2615 - 5 2026-07-01
AAL2297 American Airlines 5 2026-04-16
AAL1852 American Airlines 5 2026-05-13
AAL1849 - 5 2026-07-03
AAL1422 - 5 2026-06-26
AAL1175 American Airlines 5 2026-04-17
AAL3285 - 4 2026-06-29
AAL3204 - 4 2026-07-16
AAL3123 American Airlines 4 2026-05-16
AAL2715 American Airlines 4 2026-06-27
AAL2409 - 4 2026-07-10
AAL2271 American Airlines 4 2026-06-22
AAL2030 - 4 2026-07-12
AAL1817 - 4 2026-07-12
AAL1707 - 4 2026-06-21

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 AAL2038 JFK → CLT Jul 26, 22:05 UTCJul 26, 22:45 UTC40m
2026-07-26 AAL2038 JFK → CLT Jul 26, 15:45 UTCJul 26, 19:30 UTC3h 45m
2026-07-26 AAL1704 MSY → DCA Jul 26, 13:00 UTCJul 26, 14:15 UTC1h 15m
2026-07-25 AAL1032 JFK → MIA Jul 25, 22:30 UTCJul 25, 23:45 UTC1h 15m
2026-07-25 AAL1032 JFK → MIA Jul 25, 22:25 UTCJul 25, 23:44 UTC1h 19m
2026-07-25 AAL2098 ORD → PHL Jul 25, 19:53 UTCJul 25, 21:07 UTC1h 14m
2026-07-25 AAL2098 ORD → PHL Jul 25, 19:55 UTCJul 25, 21:10 UTC1h 15m
2026-07-25 AAL1312 LGA → ORD Jul 25, 16:15 UTCJul 25, 18:30 UTC2h 15m
2026-07-25 AAL1312 LGA → ORD Jul 25, 16:14 UTCJul 25, 18:29 UTC2h 15m
2026-07-25 AAL3180 DCA → ORD Jul 25, 10:20 UTCJul 25, 12:30 UTC2h 10m
2026-07-25 AAL2976 BOS → DFW Jul 25, 02:15 UTCJul 25, 03:35 UTC1h 20m
2026-07-24 AAL2488 ORD → CLT Jul 24, 22:50 UTCJul 25, 00:15 UTC1h 25m
2026-07-24 AAL2570 PHL → MIA Jul 24, 16:50 UTCJul 24, 21:25 UTC4h 35m
2026-07-24 AAL2570 PHL → MIA Jul 24, 16:47 UTCJul 24, 21:22 UTC4h 35m
2026-07-24 AAL607 MSY → CLT Jul 24, 11:10 UTCJul 24, 14:55 UTC3h 45m
2026-07-24 AAL607 MSY → CLT Jul 24, 11:08 UTCJul 24, 14:54 UTC3h 46m
2026-07-24 AAL3014 BOS → CLT Jul 24, 03:20 UTCJul 24, 04:45 UTC1h 25m
2026-07-24 AAL3014 BOS → CLT Jul 24, 03:17 UTCJul 24, 05:05 UTC1h 48m
2026-07-24 AAL1552 DFW → TPA Jul 24, 00:10 UTCJul 24, 02:00 UTC1h 50m
2026-07-23 AAL1552 DFW → TPA Jul 23, 20:50 UTCJul 23, 22:20 UTC1h 30m
2026-07-23 AAL1952 LAX → CLT Jul 23, 14:35 UTCJul 23, 18:50 UTC4h 15m
2026-07-23 AAL1952 LAX → CLT Jul 23, 14:30 UTCJul 23, 18:48 UTC4h 18m
2026-07-23 AAL1084 AUS → CLT Jul 23, 03:12 UTCJul 23, 05:45 UTC2h 33m
2026-07-23 AAL1084 AUS → CLT Jul 23, 03:15 UTCJul 23, 05:50 UTC2h 35m
2026-07-22 AAL2376 CLT → SFO Jul 22, 23:10 UTCJul 23, 01:30 UTC2h 20m
2026-07-22 AAL2376 CLT → SFO Jul 22, 19:45 UTCJul 22, 22:00 UTC2h 15m
2026-07-22 AAL1866 PIT → PHL Jul 22, 15:55 UTCJul 22, 18:20 UTC2h 25m
2026-07-22 AAL1866 PIT → PHL Jul 22, 12:10 UTCJul 22, 14:40 UTC2h 30m
2026-07-22 AAL2283 - Jul 22, 02:25 UTCJul 22, 05:25 UTC3h 0m
2026-07-21 AAL1862 PHL → PIT Jul 21, 22:35 UTCJul 22, 01:05 UTC2h 30m
2026-07-21 AAL1862 PHL → PIT Jul 21, 19:00 UTCJul 21, 21:30 UTC2h 30m
2026-07-21 AAL2921 MIA → SAL Jul 21, 15:20 UTCJul 21, 17:40 UTC2h 20m
2026-07-21 AAL998R DFW → LAS Jul 21, 11:55 UTCJul 21, 14:00 UTC2h 5m
2026-07-21 AAL2385 MCO → DFW Jul 21, 00:30 UTCJul 21, 02:50 UTC2h 20m
2026-07-20 AAL1660 PHL → ORD Jul 20, 21:25 UTCJul 20, 22:45 UTC1h 20m
2026-07-20 AAL2957 - Jul 20, 14:15 UTCJul 20, 18:10 UTC3h 55m
2026-07-20 AAL750 - Jul 20, 02:10 UTCJul 20, 05:55 UTC3h 45m
2026-07-19 AAL2602 - Jul 19, 18:25 UTCJul 19, 22:05 UTC3h 40m
2026-07-19 AAL2602 - Jul 19, 13:25 UTCJul 19, 16:55 UTC3h 30m
2026-07-19 AAL461 - Jul 19, 10:35 UTCJul 19, 11:50 UTC1h 15m
2026-07-19 AAL563 - Jul 19, 05:25 UTCJul 19, 09:10 UTC3h 45m
2026-07-19 AAL3033 - Jul 19, 00:25 UTCJul 19, 04:10 UTC3h 45m
2026-07-18 AAL2396 SDF → DFW Jul 18, 18:05 UTCJul 18, 22:45 UTC4h 40m
2026-07-18 AAL607 MSY → CLT Jul 18, 12:45 UTCJul 18, 16:15 UTC3h 30m
2026-07-18 AAL2840 PHL → ORD Jul 18, 03:35 UTCJul 18, 05:15 UTC1h 40m
2026-07-18 AAL2443 - Jul 18, 02:29 UTCJul 18, 02:40 UTC10m
2026-07-18 AAL2443 - Jul 18, 00:39 UTCJul 18, 02:40 UTC2h 0m
2026-07-18 AAL2443 ORD → PHL Jul 18, 00:36 UTCJul 18, 02:12 UTC1h 36m
2026-07-17 AAL1628 - Jul 17, 19:00 UTCJul 17, 22:45 UTC3h 45m
2026-07-17 AAL1628 LAX → ORD Jul 17, 18:56 UTCJul 17, 22:40 UTC3h 44m

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 N539UW page for operator, model, and routing details .

Mode-S A6D3B3 frequently asked

What is Mode-S code A6D3B3?
A6D3B3 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N539UW.
Where is Mode-S A6D3B3 registered?
Mode-S code A6D3B3 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 A6D3B3 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 A6D3B3, octal 51551663, decimal 10,933,171.
What flights does A6D3B3 operate?
Mode-S A6D3B3 has broadcast 20 distinct callsigns, including AAL3024, AAL2763, AAL3214, AAL611, AAL3234.