Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A5502B

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N441UW · AIRBUS A-321neo · operated by BANK OF UTAH TRUSTEE

Hex
A5502B
Octal
51250053
Decimal
10,833,963
Country
US
Tail
N441UW
Type
A21N
No current signal · last broadcast 8h ago
Flights observed
387
Distinct callsigns
20
Country
US
Last broadcast
8h ago

Last known position

Most recent position reported by Mode-S A5502B.

Country allocation

The ICAO 24-bit address A5502B 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
AAL2994 - 6 2026-06-27
AAL2889 American Airlines 6 2026-05-21
AAL271 - 6 2026-07-12
AAL2663 American Airlines 6 2026-06-01
AAL3218 - 5 2026-07-08
AAL2655 - 5 2026-06-26
AAL1307 - 5 2026-07-10
AAL985 American Airlines 4 2026-04-14
AAL918 - 4 2026-07-11
AAL870 American Airlines 4 2026-05-30
AAL510 - 4 2026-07-12
AAL345 American Airlines 4 2026-06-29
AAL3295 - 4 2026-07-02
AAL3202 American Airlines 4 2026-05-17
AAL2941 - 4 2026-07-02
AAL2838 - 4 2026-04-13
AAL2585 - 4 2026-06-28
AAL2408 - 4 2026-06-27
AAL2298 American Airlines 4 2026-05-21
AAL2008 American Airlines 4 2026-05-15

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 AAL667 - Jul 13, 22:55 UTCJul 14, 01:00 UTC2h 5m
2026-07-13 AAL1332 - Jul 13, 17:05 UTCJul 13, 20:55 UTC3h 50m
2026-07-13 AAL2184 - Jul 13, 12:55 UTCJul 13, 15:15 UTC2h 20m
2026-07-13 AAL3276 - Jul 13, 06:15 UTCJul 13, 11:05 UTC4h 50m
2026-07-12 AAL254 OGG → LAX Jul 12, 23:20 UTCJul 13, 04:17 UTC4h 57m
2026-07-12 AAL271 - Jul 12, 21:10 UTCJul 12, 21:20 UTC10m
2026-07-12 AAL271 - Jul 12, 16:25 UTCJul 12, 16:50 UTC25m
2026-07-12 AAL271 LAX → OGG Jul 12, 16:21 UTCJul 12, 21:07 UTC4h 46m
2026-07-12 AAL286 - Jul 12, 08:45 UTCJul 12, 13:45 UTC5h 0m
2026-07-12 AAL510 - Jul 12, 01:05 UTCJul 12, 06:10 UTC5h 5m
2026-07-12 AAL510 LAX → LIH Jul 12, 01:01 UTCJul 12, 06:24 UTC5h 23m
2026-07-11 AAL2031 - Jul 11, 17:35 UTCJul 11, 22:25 UTC4h 50m
2026-07-11 AAL2499 MCO → PHL Jul 11, 13:55 UTCJul 11, 16:00 UTC2h 5m
2026-07-11 AAL2090 - Jul 11, 11:55 UTCJul 11, 12:30 UTC35m
2026-07-11 AAL2090 MIA → MCO Jul 11, 11:51 UTCJul 11, 12:29 UTC38m
2026-07-11 AAL918 - Jul 11, 03:55 UTCJul 11, 09:00 UTC5h 5m
2026-07-11 AAL918 LIM → MIA Jul 11, 03:40 UTCJul 11, 09:01 UTC5h 21m
2026-07-10 AAL1307 - Jul 10, 20:20 UTCJul 10, 22:15 UTC1h 56m
2026-07-10 AAL1307 MIA → LIM Jul 10, 20:16 UTCJul 11, 01:36 UTC5h 20m
2026-07-10 AAL1558 - Jul 10, 12:05 UTCJul 10, 17:15 UTC5h 10m
2026-07-10 AAL385 - Jul 10, 04:05 UTCJul 10, 08:45 UTC4h 40m
2026-07-09 AAL2565 - Jul 9, 18:35 UTCJul 9, 23:30 UTC4h 55m
2026-07-09 AAL2565 - Jul 9, 11:35 UTCJul 9, 17:05 UTC5h 30m
2026-07-09 AAL1471 SEA → MIA Jul 9, 04:05 UTCJul 9, 09:30 UTC5h 25m
2026-07-08 AAL2009 DFW → SEA Jul 8, 22:15 UTCJul 9, 02:05 UTC3h 50m
2026-07-08 AAL3218 - Jul 8, 18:05 UTCJul 8, 20:50 UTC2h 45m
2026-07-08 AAL1035 - Jul 8, 11:30 UTCJul 8, 16:25 UTC4h 55m
2026-07-08 AAL1035 PHL → PHL Jul 8, 11:10 UTCJul 8, 11:20 UTC10m
2026-07-07 AAL3163 PHX → PHL Jul 7, 23:25 UTCJul 8, 03:40 UTC4h 15m
2026-07-07 AAL2108 - Jul 7, 20:10 UTCJul 7, 22:05 UTC1h 55m
2026-07-07 AAL417 PHL → DFW Jul 7, 15:20 UTCJul 7, 18:12 UTC2h 52m
2026-07-07 AAL417 PHL → DFW Jul 7, 15:05 UTCJul 7, 18:15 UTC3h 10m
2026-07-07 AAL2764 BOS → PHL Jul 7, 12:45 UTCJul 7, 13:50 UTC1h 5m
2026-07-07 AAL2701 PHX → BOS Jul 7, 05:05 UTCJul 7, 09:35 UTC4h 30m
2026-07-07 AAL818 DFW → PHX Jul 7, 01:00 UTCJul 7, 03:00 UTC2h 0m
2026-07-06 AAL2669 - Jul 6, 20:15 UTCJul 6, 23:00 UTC2h 45m
2026-07-06 AAL2669 SNA → DFW Jul 6, 20:14 UTCJul 6, 22:58 UTC2h 44m
2026-07-06 AAL2669 - Jul 6, 16:20 UTCJul 6, 18:55 UTC2h 35m
2026-07-05 AAL1467 - Jul 5, 19:40 UTCJul 5, 22:15 UTC2h 35m
2026-07-05 AAL1467 SAN → DFW Jul 5, 19:39 UTCJul 5, 22:14 UTC2h 35m
2026-07-05 AAL1621 PHL → SAN Jul 5, 16:40 UTCJul 5, 18:15 UTC1h 35m
2026-07-05 AAL1621 PHL → SAN Jul 5, 13:05 UTCJul 5, 16:05 UTC3h 0m
2026-07-05 AAL1621 PHL → SAN Jul 5, 13:02 UTCJul 5, 18:13 UTC5h 11m
2026-07-04 AAL513 - Jul 4, 23:50 UTCJul 5, 04:30 UTC4h 40m
2026-07-04 AAL513 LAX → PHL Jul 4, 23:49 UTCJul 5, 04:27 UTC4h 38m
2026-07-04 AAL2656 STL → LGA Jul 4, 21:35 UTCJul 4, 22:30 UTC55m
2026-07-04 AAL2954 SDF → DFW Jul 4, 17:10 UTCJul 4, 18:20 UTC1h 10m
2026-07-04 AAL2954 SDF → DFW Jul 4, 17:08 UTCJul 4, 19:10 UTC2h 2m
2026-07-04 AAL2888 - Jul 4, 14:25 UTCJul 4, 15:10 UTC45m
2026-07-04 AAL2888 - Jul 4, 10:20 UTCJul 4, 10:35 UTC15m

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 N441UW page for operator, model, and routing details .

Mode-S A5502B frequently asked

What is Mode-S code A5502B?
A5502B is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N441UW.
Where is Mode-S A5502B registered?
Mode-S code A5502B 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 A5502B broadcasting right now?
No active broadcast right now. Last signal was 8h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A5502B, octal 51250053, decimal 10,833,963.
What flights does A5502B operate?
Mode-S A5502B has broadcast 20 distinct callsigns, including AAL2994, AAL2889, AAL271, AAL2663, AAL3218.