Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A15516

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N185UW · AIRBUS A-321 · operated by AMERICAN AIRLINES INC

Hex
A15516
Octal
50252426
Decimal
10,573,078
Country
US
Tail
N185UW
Type
A321
No current signal · last broadcast 2h ago
Flights observed
423
Distinct callsigns
20
Country
US
Last broadcast
2h ago

Last known position

Most recent position reported by Mode-S A15516.

Country allocation

The ICAO 24-bit address A15516 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
AAL1028 American Airlines 6 2026-05-06
AAL760 American Airlines 5 2026-05-03
AAL636 American Airlines 5 2026-05-15
AAL2945 - 5 2026-06-13
AAL1563 - 5 2026-04-13
AAL716 American Airlines 4 2026-06-03
AAL711 American Airlines 4 2026-05-17
AAL575 - 4 2026-07-01
AAL3285 - 4 2026-07-13
AAL2947 American Airlines 4 2026-05-28
AAL2584 American Airlines 4 2026-06-13
AAL2507 American Airlines 4 2026-04-18
AAL2288 American Airlines 4 2026-05-01
AAL2092 American Airlines 4 2026-05-09
AAL1973 American Airlines 4 2026-06-30
AAL1943 - 4 2026-06-18
AAL1840 - 4 2026-04-16
AAL1565 American Airlines 4 2026-07-03
AAL1503 American Airlines 4 2026-05-19
AAL1365 American Airlines 4 2026-05-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 AAL2974 DFW → MCO Jul 13, 23:40 UTCJul 14, 01:50 UTC2h 10m
2026-07-13 AAL1849 - Jul 13, 18:45 UTCJul 13, 21:50 UTC3h 5m
2026-07-13 AAL1849 DFW → SFO Jul 13, 14:15 UTCJul 13, 17:15 UTC3h 0m
2026-07-13 AAL2272 OKC → DFW Jul 13, 11:10 UTCJul 13, 11:50 UTC40m
2026-07-13 AAL2272 OKC → DFW Jul 13, 11:10 UTCJul 13, 11:48 UTC38m
2026-07-13 AAL2734 DFW → OKC Jul 13, 06:40 UTCJul 13, 07:15 UTC35m
2026-07-13 AAL2734 DFW → OKC Jul 13, 06:40 UTCJul 13, 07:10 UTC30m
2026-07-13 AAL3285 - Jul 13, 03:25 UTCJul 13, 04:50 UTC1h 25m
2026-07-13 AAL3285 AUS → DFW Jul 13, 03:06 UTCJul 13, 04:50 UTC1h 44m
2026-07-12 AAL3285 LAS → AUS Jul 12, 22:50 UTCJul 13, 01:30 UTC2h 40m
2026-07-12 AAL3285 DFW → LAS Jul 12, 16:35 UTCJul 12, 18:50 UTC2h 15m
2026-07-12 AAL1171 - Jul 12, 13:10 UTCJul 12, 15:20 UTC2h 10m
2026-07-12 AAL1171 JAX → DFW Jul 12, 13:09 UTCJul 12, 15:14 UTC2h 5m
2026-07-12 AAL2263 DFW → JAX Jul 12, 00:10 UTCJul 12, 02:05 UTC1h 55m
2026-07-11 AAL767 SEA → DFW Jul 11, 19:10 UTCJul 11, 22:30 UTC3h 20m
2026-07-11 AAL767 DFW → SEA Jul 11, 13:45 UTCJul 11, 17:35 UTC3h 50m
2026-07-11 AAL2429 SEA → DFW Jul 11, 07:55 UTCJul 11, 11:15 UTC3h 20m
2026-07-11 AAL3223 DFW → SEA Jul 11, 02:35 UTCJul 11, 06:20 UTC3h 45m
2026-07-11 AAL3223 DFW → SEA Jul 11, 02:33 UTCJul 11, 06:19 UTC3h 46m
2026-07-10 AAL2594 SLC → DFW Jul 10, 22:50 UTCJul 11, 01:05 UTC2h 15m
2026-07-10 AAL2594 SLC → DFW Jul 10, 22:51 UTCJul 11, 01:01 UTC2h 10m
2026-07-10 AAL2594 DFW → SLC Jul 10, 19:25 UTCJul 10, 21:40 UTC2h 15m
2026-07-10 AAL812 - Jul 10, 14:45 UTCJul 10, 17:55 UTC3h 10m
2026-07-10 AAL2129 - Jul 10, 11:15 UTCJul 10, 13:35 UTC2h 20m
2026-07-10 AAL2129 MIA → PHL Jul 10, 11:13 UTCJul 10, 13:26 UTC2h 13m
2026-07-10 AAL2690 - Jul 10, 00:05 UTCJul 10, 02:35 UTC2h 30m
2026-07-09 AAL2910 - Jul 9, 19:10 UTCJul 9, 21:55 UTC2h 45m
2026-07-06 AAL1250 PHL → PBI Jul 6, 13:45 UTCJul 6, 16:20 UTC2h 35m
2026-07-06 AAL2919 - Jul 6, 08:10 UTCJul 6, 12:00 UTC3h 50m
2026-07-06 AAL1084 AUS → CLT Jul 6, 03:00 UTCJul 6, 05:45 UTC2h 45m
2026-07-05 AAL1595 - Jul 5, 20:20 UTCJul 5, 23:50 UTC3h 30m
2026-07-05 AAL1595 DFW → BOS Jul 5, 15:35 UTCJul 5, 18:45 UTC3h 10m
2026-07-05 AAL2575 - Jul 5, 11:15 UTCJul 5, 13:50 UTC2h 35m
2026-07-04 AAL1174 JFK → MIA Jul 4, 23:20 UTCJul 5, 02:00 UTC2h 40m
2026-07-04 AAL642 - Jul 4, 18:15 UTCJul 4, 20:45 UTC2h 30m
2026-07-04 AAL1250 PHL → PBI Jul 4, 14:15 UTCJul 4, 16:50 UTC2h 35m
2026-07-04 AAL3304 - Jul 4, 03:10 UTCJul 4, 06:30 UTC3h 20m
2026-07-04 AAL3304 MIA → ORD Jul 4, 03:09 UTCJul 4, 06:24 UTC3h 15m
2026-07-03 AAL1565 DFW → CMH Jul 3, 20:05 UTCJul 3, 22:50 UTC2h 45m
2026-07-03 AAL1565 DFW → CMH Jul 3, 15:20 UTCJul 3, 18:20 UTC3h 0m
2026-07-03 AAL873 BOS → MIA Jul 3, 10:20 UTCJul 3, 13:10 UTC2h 50m
2026-07-03 AAL1843 - Jul 3, 02:55 UTCJul 3, 04:35 UTC1h 40m
2026-07-03 AAL1843 CLT → BOS Jul 3, 02:52 UTCJul 3, 04:34 UTC1h 42m
2026-07-03 AAL2394 - Jul 3, 00:40 UTCJul 3, 01:10 UTC30m
2026-07-03 AAL2394 RDU → CLT Jul 3, 00:37 UTCJul 3, 01:08 UTC31m
2026-07-02 AAL2394 - Jul 2, 22:30 UTCJul 2, 22:55 UTC25m
2026-07-02 AAL611 FLL → PHL Jul 2, 18:55 UTCJul 2, 20:10 UTC1h 15m
2026-07-02 AAL611 FLL → PHL Jul 2, 13:50 UTCJul 2, 15:10 UTC1h 20m
2026-07-02 AAL3182 - Jul 2, 10:05 UTCJul 2, 11:35 UTC1h 30m
2026-07-02 AAL2763 - Jul 2, 02:30 UTCJul 2, 04:00 UTC1h 30m

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 N185UW page for operator, model, and routing details .

Mode-S A15516 frequently asked

What is Mode-S code A15516?
A15516 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N185UW.
Where is Mode-S A15516 registered?
Mode-S code A15516 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 A15516 broadcasting right now?
No active broadcast right now. Last signal was 2h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A15516, octal 50252426, decimal 10,573,078.
What flights does A15516 operate?
Mode-S A15516 has broadcast 20 distinct callsigns, including AAL1028, AAL760, AAL636, AAL2945, AAL1563.