Apparatus

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sensors Mode-S transponder

ADDA24

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N992AU · AIRBUS A-321 · operated by UMB BANK N A TRUSTEE

Hex
ADDA24
Octal
53355044
Decimal
11,393,572
Country
US
Tail
N992AU
Type
A321
No current signal · last broadcast 4h ago
Flights observed
483
Distinct callsigns
20
Country
US
Last broadcast
4h ago

Last known position

Most recent position reported by Mode-S ADDA24.

Country allocation

The ICAO 24-bit address ADDA24 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
AAL3187 American Airlines 6 2026-06-10
AAL514 American Airlines 5 2026-06-19
AAL3009 American Airlines 5 2026-04-21
AAL702 American Airlines 4 2026-06-10
AAL503 - 4 2026-07-03
AAL3001 - 4 2026-07-05
AAL2748 American Airlines 4 2026-06-16
AAL2681 American Airlines 4 2026-05-09
AAL2459 American Airlines 4 2026-05-22
AAL2376 - 4 2026-07-13
AAL1497 American Airlines 4 2026-04-16
AAL1037 - 4 2026-07-03
AAL750 American Airlines 3 2026-04-18
AAL410 American Airlines 3 2026-04-15
AAL3259 - 3 2026-06-21
AAL2947 - 3 2026-07-13
AAL2932 American Airlines 3 2026-05-06
AAL2919 American Airlines 3 2026-04-17
AAL2876 - 3 2026-07-02
AAL2763 - 3 2026-06-15

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 AAL1984 - Jul 13, 22:15 UTCJul 14, 02:50 UTC4h 35m
2026-07-13 AAL1984 - Jul 13, 21:40 UTCJul 13, 21:55 UTC15m
2026-07-13 AAL1984 PHL → PHL Jul 13, 21:20 UTCJul 13, 21:25 UTC5m
2026-07-13 AAL2947 - Jul 13, 17:45 UTCJul 13, 20:45 UTC3h 0m
2026-07-13 AAL2893 - Jul 13, 14:00 UTCJul 13, 16:30 UTC2h 30m
2026-07-13 AAL1534 DFW → ONT Jul 13, 06:30 UTCJul 13, 08:55 UTC2h 25m
2026-07-13 AAL2376 LAS → DFW Jul 13, 02:15 UTCJul 13, 04:35 UTC2h 20m
2026-07-12 AAL2376 DFW → LAS Jul 12, 20:35 UTCJul 12, 22:50 UTC2h 15m
2026-07-12 AAL1241 LAS → DFW Jul 12, 15:40 UTCJul 12, 18:15 UTC2h 35m
2026-07-12 AAL2872 DFW → LAS Jul 12, 03:42 UTCJul 12, 05:51 UTC2h 9m
2026-07-12 AAL2872 DFW → LAS Jul 12, 03:45 UTCJul 12, 05:55 UTC2h 10m
2026-07-11 AAL2325 - Jul 11, 23:20 UTCJul 12, 02:20 UTC3h 0m
2026-07-11 AAL1687 - Jul 11, 17:10 UTCJul 11, 22:01 UTC4h 50m
2026-07-11 AAL1687 CLT → SFO Jul 11, 17:10 UTCJul 11, 21:59 UTC4h 49m
2026-07-11 AAL573 - Jul 11, 12:50 UTCJul 11, 15:35 UTC2h 45m
2026-07-11 AAL573 DEN → CLT Jul 11, 12:49 UTCJul 11, 15:33 UTC2h 44m
2026-07-10 AAL1736 - Jul 10, 23:45 UTCJul 11, 03:10 UTC3h 25m
2026-07-10 AAL2098 - Jul 10, 20:25 UTCJul 10, 21:35 UTC1h 10m
2026-07-10 AAL1312 DFW → MCO Jul 10, 16:40 UTCJul 10, 18:50 UTC2h 10m
2026-07-10 AAL2964 PHL → DFW Jul 10, 11:30 UTCJul 10, 14:15 UTC2h 45m
2026-07-10 AAL1188 PHX → PHL Jul 10, 05:50 UTCJul 10, 10:10 UTC4h 20m
2026-07-10 AAL1362 - Jul 10, 02:55 UTCJul 10, 03:55 UTC1h 0m
2026-07-10 AAL2930 - Jul 10, 00:10 UTCJul 10, 01:05 UTC55m
2026-07-09 AAL1384 ORD → PHX Jul 9, 19:38 UTCJul 9, 22:49 UTC3h 11m
2026-07-09 AAL1384 ORD → PHX Jul 9, 19:40 UTCJul 9, 22:50 UTC3h 10m
2026-07-09 AAL3330 - Jul 9, 15:55 UTCJul 9, 17:45 UTC1h 50m
2026-07-09 AAL3330 DFW → ORD Jul 9, 15:51 UTCJul 9, 17:41 UTC1h 50m
2026-07-09 AAL1902 ORD → DFW Jul 9, 12:20 UTCJul 9, 14:30 UTC2h 10m
2026-07-09 AAL3137 - Jul 9, 02:25 UTCJul 9, 05:25 UTC3h 0m
2026-07-08 AAL2986 PDX → PHX Jul 8, 23:05 UTCJul 9, 01:15 UTC2h 10m
2026-07-08 AAL1625 PHX → PDX Jul 8, 19:10 UTCJul 8, 21:25 UTC2h 15m
2026-07-08 AAL2015 MCO → PHX Jul 8, 14:10 UTCJul 8, 18:00 UTC3h 50m
2026-07-07 AAL486 ORD → MCO Jul 7, 22:50 UTCJul 8, 01:05 UTC2h 15m
2026-07-07 AAL2252 PHX → ORD Jul 7, 17:45 UTCJul 7, 20:45 UTC3h 0m
2026-07-07 AAL2252 PHX → ORD Jul 7, 17:41 UTCJul 7, 20:40 UTC2h 59m
2026-07-07 AAL3086 BNA → PHX Jul 7, 12:45 UTCJul 7, 15:50 UTC3h 5m
2026-07-07 AAL3086 BNA → PHX Jul 7, 12:41 UTCJul 7, 15:47 UTC3h 6m
2026-07-07 AAL2149 LAX → BNA Jul 7, 07:05 UTCJul 7, 10:40 UTC3h 35m
2026-07-07 AAL2364 ORD → LAX Jul 7, 02:25 UTCJul 7, 05:55 UTC3h 30m
2026-07-06 AAL215 CUN → ORD Jul 6, 20:35 UTCJul 6, 23:40 UTC3h 5m
2026-07-06 AAL492 ORD → CUN Jul 6, 16:10 UTCJul 6, 19:25 UTC3h 15m
2026-07-06 AAL323R - Jul 6, 11:15 UTCJul 6, 13:55 UTC2h 40m
2026-07-06 AAL323R MIA → ORD Jul 6, 11:13 UTCJul 6, 13:49 UTC2h 36m
2026-07-06 AAL1800 BOS → CLT Jul 6, 01:25 UTCJul 6, 01:45 UTC20m
2026-07-06 AAL1800 BOS → CLT Jul 6, 00:05 UTCJul 6, 00:20 UTC15m
2026-07-05 AAL1800 BOS → CLT Jul 5, 23:25 UTCJul 5, 23:35 UTC10m
2026-07-05 AAL2739 - Jul 5, 21:35 UTCJul 5, 21:55 UTC20m
2026-07-05 AAL2739 - Jul 5, 19:30 UTCJul 5, 19:45 UTC15m
2026-07-05 AAL3001 - Jul 5, 16:25 UTCJul 5, 16:50 UTC25m
2026-07-05 AAL3001 - Jul 5, 14:40 UTCJul 5, 14:55 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 N992AU page for operator, model, and routing details .

Mode-S ADDA24 frequently asked

What is Mode-S code ADDA24?
ADDA24 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N992AU.
Where is Mode-S ADDA24 registered?
Mode-S code ADDA24 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 ADDA24 broadcasting right now?
No active broadcast right now. Last signal was 4h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex ADDA24, octal 53355044, decimal 11,393,572.
What flights does ADDA24 operate?
Mode-S ADDA24 has broadcast 20 distinct callsigns, including AAL3187, AAL514, AAL3009, AAL702, AAL503.