Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A0541B

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N120EE · AIRBUS A-321 · operated by UMB BANK NA TRUSTEE

Hex
A0541B
Octal
50052033
Decimal
10,507,291
Country
US
Tail
N120EE
Type
A321
No current signal · last broadcast Jul 26, 22:45 UTC
Flights observed
553
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:45 UTC

Last known position

Most recent position reported by Mode-S A0541B.

Country allocation

The ICAO 24-bit address A0541B 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
AAL783 - 9 2026-07-08
AAL2845 American Airlines 9 2026-04-30
AAL2038 American Airlines 9 2026-07-25
AAL2444 - 8 2026-07-18
AAL727 - 6 2026-06-23
AAL2109 American Airlines 6 2026-06-04
AAL1865 - 6 2026-07-02
AAL1563 American Airlines 6 2026-05-18
AAL2830 American Airlines 5 2026-05-28
AAL2446 American Airlines 5 2026-05-01
AAL2379 - 5 2026-07-13
AAL1635 American Airlines 5 2026-05-08
AAL870 American Airlines 4 2026-06-21
AAL3001 American Airlines 4 2026-06-05
AAL2852 American Airlines 4 2026-05-19
AAL2562 - 4 2026-07-07
AAL2519 American Airlines 4 2026-04-22
AAL2270 - 4 2026-07-11
AAL2128 - 4 2026-07-05
AAL1850 American Airlines 4 2026-06-19

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 AAL2513 CLT → CMH Jul 26, 22:15 UTCJul 26, 22:45 UTC30m
2026-07-26 AAL1583 CMH → DFW Jul 26, 17:05 UTCJul 26, 20:30 UTC3h 25m
2026-07-26 AAL1583 CMH → DFW Jul 26, 12:20 UTCJul 26, 15:40 UTC3h 20m
2026-07-26 AAL2003 DCA → LGA Jul 26, 06:55 UTCJul 26, 10:05 UTC3h 10m
2026-07-26 AAL2003 DCA → LGA Jul 26, 01:50 UTCJul 26, 05:25 UTC3h 35m
2026-07-25 AAL2456 SEA → PHL Jul 25, 21:44 UTCJul 26, 00:23 UTC2h 39m
2026-07-25 AAL2456 SEA → PHL Jul 25, 21:45 UTCJul 26, 00:30 UTC2h 45m
2026-07-25 AAL466 JFK → MIA Jul 25, 16:15 UTCJul 25, 20:20 UTC4h 5m
2026-07-25 AAL466 JFK → MIA Jul 25, 16:09 UTCJul 25, 20:16 UTC4h 7m
2026-07-25 AAL1002 - Jul 25, 12:35 UTCJul 25, 14:20 UTC1h 45m
2026-07-25 AAL1002 MSN → CLT Jul 25, 12:30 UTCJul 25, 14:19 UTC1h 49m
2026-07-25 AAL426Q CLT → MSN Jul 25, 09:40 UTCJul 25, 11:20 UTC1h 40m
2026-07-25 AAL426Q CLT → MSN Jul 25, 09:39 UTCJul 25, 11:18 UTC1h 39m
2026-07-25 AAL2038 JFK → CLT Jul 25, 05:20 UTCJul 25, 07:20 UTC2h 0m
2026-07-25 AAL2038 JFK → CLT Jul 25, 01:55 UTCJul 25, 04:10 UTC2h 15m
2026-07-24 AAL2038 JFK → CLT Jul 24, 18:35 UTCJul 24, 22:40 UTC4h 5m
2026-07-24 AAL381 LGA → ORD Jul 24, 12:25 UTCJul 24, 16:35 UTC4h 10m
2026-07-24 AAL3105 DFW → MSP Jul 24, 02:05 UTCJul 24, 06:05 UTC4h 0m
2026-07-24 AAL3105 DFW → MSP Jul 24, 02:04 UTCJul 24, 06:00 UTC3h 56m
2026-07-23 AAL3303 CMH → PHL Jul 23, 20:55 UTCJul 24, 00:25 UTC3h 30m
2026-07-23 AAL1625 PHX → PDX Jul 23, 17:22 UTCJul 23, 19:32 UTC2h 10m
2026-07-23 AAL1625 - Jul 23, 17:25 UTCJul 23, 19:35 UTC2h 10m
2026-07-23 AAL2015 MCO → PHX Jul 23, 11:48 UTCJul 23, 15:35 UTC3h 47m
2026-07-23 AAL2015 MCO → PHX Jul 23, 11:50 UTCJul 23, 15:40 UTC3h 50m
2026-07-23 AAL2974 - Jul 23, 02:25 UTCJul 23, 02:30 UTC5m
2026-07-23 AAL2974 - Jul 23, 00:15 UTCJul 23, 02:20 UTC2h 5m
2026-07-22 AAL2219 CUN → DFW Jul 22, 19:45 UTCJul 22, 22:00 UTC2h 15m
2026-07-22 AAL2219 CUN → DFW Jul 22, 19:40 UTCJul 22, 21:58 UTC2h 18m
2026-07-22 AAL2874 - Jul 22, 16:00 UTCJul 22, 18:20 UTC2h 20m
2026-07-22 AAL1707 CLT → EWR Jul 22, 11:30 UTCJul 22, 13:55 UTC2h 25m
2026-07-19 AAL9780 PVD → CLT Jul 19, 02:40 UTCJul 19, 03:35 UTC55m
2026-07-19 AAL2394 - Jul 19, 01:05 UTCJul 19, 01:35 UTC30m
2026-07-18 AAL2394 - Jul 18, 23:25 UTCJul 18, 23:55 UTC30m
2026-07-18 AAL2444 - Jul 18, 20:05 UTCJul 18, 21:30 UTC1h 25m
2026-07-18 AAL2444 - Jul 18, 17:25 UTCJul 18, 18:50 UTC1h 25m
2026-07-18 AAL2310 - Jul 18, 14:40 UTCJul 18, 15:35 UTC55m
2026-07-18 AAL2310 - Jul 18, 12:15 UTCJul 18, 13:10 UTC55m
2026-07-18 AAL2751 DFW → PHL Jul 18, 06:45 UTCJul 18, 10:45 UTC4h 0m
2026-07-18 AAL2785 - Jul 18, 03:40 UTCJul 18, 04:30 UTC50m
2026-07-17 AAL2221 CLT → IND Jul 17, 22:15 UTCJul 18, 02:14 UTC4h 0m
2026-07-17 AAL1373 - Jul 17, 16:40 UTCJul 17, 20:20 UTC3h 40m
2026-07-17 AAL2027 - Jul 17, 13:55 UTCJul 17, 14:44 UTC50m
2026-07-17 AAL2027 LAX → PHX Jul 17, 13:51 UTCJul 17, 14:49 UTC58m
2026-07-17 AAL2766 - Jul 17, 00:35 UTCJul 17, 03:05 UTC2h 30m
2026-07-16 AAL1215 - Jul 16, 20:19 UTCJul 16, 21:45 UTC1h 25m
2026-07-16 AAL1215 - Jul 16, 15:55 UTCJul 16, 17:20 UTC1h 25m
2026-07-16 AAL1215 DFW → PVR Jul 16, 15:51 UTCJul 16, 18:03 UTC2h 12m
2026-07-16 AAL2583 BNA → DFW Jul 16, 12:14 UTCJul 16, 13:49 UTC1h 35m
2026-07-16 AAL2583 BNA → DFW Jul 16, 12:13 UTCJul 16, 13:40 UTC1h 27m
2026-07-16 AAL1370 PHX → BNA Jul 16, 00:35 UTCJul 16, 03:50 UTC3h 15m

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 N120EE page for operator, model, and routing details .

Mode-S A0541B frequently asked

What is Mode-S code A0541B?
A0541B is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N120EE.
Where is Mode-S A0541B registered?
Mode-S code A0541B 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 A0541B 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 A0541B, octal 50052033, decimal 10,507,291.
What flights does A0541B operate?
Mode-S A0541B has broadcast 20 distinct callsigns, including AAL783, AAL2845, AAL2038, AAL2444, AAL727.