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
Transponder active on ground
Flights observed
438
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:30 UTC

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
AAL271 American Airlines 8 2026-07-19
AAL510 American Airlines 7 2026-07-22
AAL2655 - 7 2026-07-18
AAL2994 - 6 2026-06-27
AAL2889 American Airlines 6 2026-05-21
AAL2663 American Airlines 6 2026-06-01
AAL1467 American Airlines 6 2026-07-20
AAL3218 - 5 2026-07-08
AAL1621 - 5 2026-07-20
AAL1307 - 5 2026-07-10
AAL985 American Airlines 4 2026-04-14
AAL918 - 4 2026-07-11
AAL870 American Airlines 4 2026-05-30
AAL395 American Airlines 4 2026-07-21
AAL345 American Airlines 4 2026-06-29
AAL3328 American Airlines 4 2026-07-24
AAL3295 - 4 2026-07-02
AAL3202 American Airlines 4 2026-05-17
AAL2941 - 4 2026-07-02
AAL286 American Airlines 4 2026-07-22

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 AAL2192 ORD → SFO Jul 26, 21:15 UTCJul 26, 22:30 UTC1h 15m
2026-07-26 AAL1748 SFO → MSY Jul 26, 14:55 UTCJul 26, 19:15 UTC4h 20m
2026-07-26 AAL2093 LIR → AUS Jul 26, 11:35 UTCJul 26, 13:40 UTC2h 5m
2026-07-26 AAL2045 MIA → SFO Jul 26, 04:30 UTCJul 26, 09:05 UTC4h 36m
2026-07-25 AAL2045 MIA → SFO Jul 25, 20:50 UTCJul 26, 02:10 UTC5h 20m
2026-07-25 AAL1151 ATL → MIA Jul 25, 14:25 UTCJul 25, 19:05 UTC4h 40m
2026-07-24 AAL3328 DFW → LAX Jul 24, 00:35 UTCJul 24, 05:10 UTC4h 35m
2026-07-23 AAL3016 - Jul 23, 18:05 UTCJul 23, 22:50 UTC4h 45m
2026-07-23 AAL3016 LAX → MIA Jul 23, 18:01 UTCJul 23, 22:49 UTC4h 48m
2026-07-23 AAL1928 MCO → LAX Jul 23, 11:26 UTCJul 23, 15:49 UTC4h 23m
2026-07-23 AAL1928 - Jul 23, 11:30 UTCJul 23, 15:50 UTC4h 20m
2026-07-22 AAL2192 ORD → SFO Jul 22, 21:25 UTCJul 23, 01:55 UTC4h 30m
2026-07-22 AAL286 PHL → STL Jul 22, 12:40 UTCJul 22, 13:20 UTC40m
2026-07-22 AAL510 PHL → SAN Jul 22, 01:00 UTCJul 22, 01:30 UTC30m
2026-07-22 AAL510 PHL → SAN Jul 22, 00:58 UTCJul 22, 06:36 UTC5h 38m
2026-07-21 AAL3334 - Jul 21, 18:30 UTCJul 21, 21:10 UTC2h 40m
2026-07-21 AAL3334 DFW → LAX Jul 21, 18:27 UTCJul 21, 21:02 UTC2h 35m
2026-07-21 AAL1139 RDU → LGA Jul 21, 14:55 UTCJul 21, 16:55 UTC2h 0m
2026-07-21 AAL1139 RDU → LGA Jul 21, 14:53 UTCJul 21, 16:50 UTC1h 57m
2026-07-21 AAL2991 ANC → PHX Jul 21, 07:55 UTCJul 21, 13:05 UTC5h 10m
2026-07-21 AAL395 SAN → PHL Jul 21, 00:25 UTCJul 21, 06:25 UTC6h 0m
2026-07-21 AAL395 SAN → PHL Jul 21, 00:20 UTCJul 21, 06:29 UTC6h 9m
2026-07-20 AAL1467 LAX → CLT Jul 20, 19:35 UTCJul 20, 22:10 UTC2h 35m
2026-07-20 AAL1467 LAX → CLT Jul 20, 19:33 UTCJul 20, 22:10 UTC2h 37m
2026-07-20 AAL1621 PHL → SAN Jul 20, 13:05 UTCJul 20, 17:45 UTC4h 40m
2026-07-20 AAL3276 - Jul 20, 06:25 UTCJul 20, 11:10 UTC4h 45m
2026-07-20 AAL254 OGG → LAX Jul 20, 03:50 UTCJul 20, 04:35 UTC45m
2026-07-19 AAL271 LAX → OGG Jul 19, 16:15 UTCJul 19, 16:45 UTC30m
2026-07-19 AAL271 LAX → OGG Jul 19, 16:14 UTCJul 19, 21:12 UTC4h 58m
2026-07-19 AAL286 - Jul 19, 12:50 UTCJul 19, 13:40 UTC50m
2026-07-19 AAL510 - Jul 19, 01:30 UTCJul 19, 06:50 UTC5h 20m
2026-07-18 AAL2368 - Jul 18, 22:55 UTCJul 18, 23:50 UTC55m
2026-07-18 AAL2655 - Jul 18, 20:55 UTCJul 18, 21:45 UTC50m
2026-07-18 AAL2655 - Jul 18, 17:35 UTCJul 18, 18:30 UTC55m
2026-07-18 AAL818 PHX → CLT Jul 18, 01:10 UTCJul 18, 02:45 UTC1h 35m
2026-07-18 AAL818 PHX → CLT Jul 18, 01:09 UTCJul 18, 03:11 UTC2h 2m
2026-07-17 AAL1583 - Jul 17, 17:25 UTCJul 17, 20:44 UTC3h 20m
2026-07-17 AAL1583 DFW → BOS Jul 17, 12:45 UTCJul 17, 15:55 UTC3h 10m
2026-07-17 AAL1355 - Jul 17, 05:04 UTCJul 17, 11:04 UTC6h 0m
2026-07-17 AAL1355 ANC → DFW Jul 17, 05:00 UTCJul 17, 11:12 UTC6h 12m
2026-07-16 AAL1355 DFW → ANC Jul 16, 21:19 UTCJul 17, 03:39 UTC6h 20m
2026-07-16 AAL1186 - Jul 16, 16:19 UTCJul 16, 19:10 UTC2h 50m
2026-07-16 AAL2930 - Jul 16, 00:10 UTCJul 16, 01:05 UTC55m
2026-07-16 AAL2930 PHX → LAX Jul 16, 00:06 UTCJul 16, 01:01 UTC55m
2026-07-15 AAL1057 BOS → PHX Jul 15, 17:20 UTCJul 15, 22:05 UTC4h 45m
2026-07-15 AAL1416 PHL → BOS Jul 15, 14:50 UTCJul 15, 15:40 UTC50m
2026-07-15 AAL1416 PHL → BOS Jul 15, 14:50 UTCJul 15, 15:38 UTC48m
2026-07-15 AAL2695 SFO → PHL Jul 15, 08:00 UTCJul 15, 13:00 UTC5h 0m
2026-07-15 AAL2426 - Jul 15, 00:50 UTCJul 15, 06:10 UTC5h 20m
2026-07-14 AAL2517 - Jul 14, 16:55 UTCJul 14, 22:40 UTC5h 45m

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?
Mode-S A5502B 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 A5502B, octal 51250053, decimal 10,833,963.
What flights does A5502B operate?
Mode-S A5502B has broadcast 20 distinct callsigns, including AAL271, AAL510, AAL2655, AAL2994, AAL2889.