Apparatus

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sensors Mode-S transponder

A56C19

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N449AN · AIRBUS A-321neo · operated by AMERICAN AIRLINES INC

Hex
A56C19
Octal
51266031
Decimal
10,841,113
Country
US
Tail
N449AN
Type
A21N
Broadcasting now · callsign AAL3022 · 35,000 ft
Flights observed
466
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:15 UTC

Current position

A56C19 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A56C19 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
AAL3202 American Airlines 12 2026-05-04
AAL2239 American Airlines 9 2026-04-29
AAL556 American Airlines 8 2026-04-19
AAL2927 - 8 2026-07-16
AAL205 American Airlines 8 2026-05-29
AAL1665 American Airlines 8 2026-07-26
AAL297 American Airlines 7 2026-05-13
AAL2882 American Airlines 7 2026-04-19
AAL2659 - 7 2026-07-08
AAL2177 American Airlines 7 2026-05-05
AAL663 - 6 2026-07-04
AAL358 American Airlines 6 2026-05-04
AAL693 American Airlines 5 2026-05-26
AAL58 - 5 2026-07-04
AAL432 American Airlines 5 2026-06-07
AAL3220 American Airlines 5 2026-05-03
AAL3044 - 5 2026-07-11
AAL2300 - 5 2026-07-14
AAL1688 American Airlines 5 2026-05-04
AAL164 American Airlines 5 2026-05-27

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 AAL1079 ORD → AUS Jul 26, 20:50 UTCJul 26, 22:15 UTC1h 25m
2026-07-26 AAL1678 CLT → PHX Jul 26, 14:55 UTCJul 26, 18:30 UTC3h 35m
2026-07-26 AAL1665 LAS → CLT Jul 26, 03:10 UTCJul 26, 06:55 UTC3h 46m
2026-07-25 AAL3040 PHL → LAS Jul 25, 20:15 UTCJul 26, 00:50 UTC4h 35m
2026-07-25 AAL3040 PHL → LAS Jul 25, 20:10 UTCJul 26, 00:45 UTC4h 35m
2026-07-25 AAL2955 SFO → MIA Jul 25, 13:35 UTCJul 25, 18:10 UTC4h 35m
2026-07-24 AAL1489 CLT → EWR Jul 24, 20:05 UTCJul 25, 01:10 UTC5h 5m
2026-07-24 AAL1489 CLT → EWR Jul 24, 20:02 UTCJul 25, 01:05 UTC5h 3m
2026-07-24 AAL2161 BOS → JFK Jul 24, 13:15 UTCJul 24, 18:00 UTC4h 45m
2026-07-24 AAL446 DFW → SFO Jul 24, 05:05 UTCJul 24, 08:05 UTC3h 0m
2026-07-24 AAL446 DFW → SFO Jul 24, 05:03 UTCJul 24, 08:01 UTC2h 58m
2026-07-23 AAL757 DFW → MIA Jul 23, 23:30 UTCJul 24, 02:50 UTC3h 20m
2026-07-23 AAL757 DFW → MIA Jul 23, 23:28 UTCJul 24, 02:47 UTC3h 19m
2026-07-23 AAL757 DFW → MIA Jul 23, 18:10 UTCJul 23, 21:55 UTC3h 45m
2026-07-23 AAL1198 SFO → DFW Jul 23, 12:50 UTCJul 23, 15:45 UTC2h 55m
2026-07-23 AAL1198 SFO → DFW Jul 23, 12:47 UTCJul 23, 15:43 UTC2h 56m
2026-07-23 AAL3295 BOS → CLT Jul 23, 02:05 UTCJul 23, 07:35 UTC5h 30m
2026-07-22 AAL3319 FSD → IAH Jul 22, 19:35 UTCJul 23, 00:05 UTC4h 30m
2026-07-22 AAL843 PHL → IND Jul 22, 12:50 UTCJul 22, 17:35 UTC4h 45m
2026-07-21 AAL2888 DCA → PVD Jul 21, 21:00 UTCJul 22, 01:40 UTC4h 40m
2026-07-21 AAL1313 PHL → DEN Jul 21, 06:30 UTCJul 21, 11:50 UTC5h 20m
2026-07-20 AAL271 LAX → OGG Jul 20, 16:15 UTCJul 21, 04:10 UTC11h 55m
2026-07-19 AAL1284 IND → PHL Jul 19, 22:45 UTCJul 20, 03:30 UTC4h 45m
2026-07-19 AAL1284 IND → PHL Jul 19, 22:25 UTCJul 19, 22:35 UTC10m
2026-07-19 AAL779 LAS → PHL Jul 19, 16:00 UTCJul 19, 20:25 UTC4h 25m
2026-07-19 AAL779 LAS → PHL Jul 19, 16:00 UTCJul 19, 20:23 UTC4h 23m
2026-07-19 AAL1969 - Jul 19, 12:15 UTCJul 19, 14:25 UTC2h 10m
2026-07-18 AAL3258 LAX → SFO Jul 18, 20:35 UTCJul 18, 23:40 UTC3h 5m
2026-07-18 AAL3258 LAX → SFO Jul 18, 20:32 UTCJul 18, 23:36 UTC3h 4m
2026-07-18 AAL1524 MIA → LAS Jul 18, 13:35 UTCJul 18, 18:55 UTC5h 20m
2026-07-18 AAL1524 MIA → LAS Jul 18, 12:45 UTCJul 18, 13:00 UTC15m
2026-07-18 AAL1121 ORD → MCO Jul 18, 05:27 UTCJul 18, 09:51 UTC4h 24m
2026-07-18 AAL1121 ORD → MCO Jul 18, 05:30 UTCJul 18, 09:50 UTC4h 20m
2026-07-17 AAL596 - Jul 17, 23:35 UTCJul 18, 03:45 UTC4h 11m
2026-07-17 AAL1678 - Jul 17, 17:20 UTCJul 17, 21:05 UTC3h 45m
2026-07-17 AAL769 ORD → PHX Jul 17, 13:15 UTCJul 17, 16:10 UTC2h 55m
2026-07-17 AAL435 PHX → ORD Jul 17, 01:49 UTCJul 17, 04:54 UTC3h 5m
2026-07-16 AAL3203 - Jul 16, 20:09 UTCJul 17, 00:35 UTC4h 25m
2026-07-16 AAL3203 PHL → PHL Jul 16, 19:55 UTCJul 16, 20:00 UTC5m
2026-07-16 AAL2927 - Jul 16, 14:25 UTCJul 16, 18:40 UTC4h 15m
2026-07-16 AAL2927 PHX → PHX Jul 16, 05:30 UTCJul 16, 06:25 UTC55m
2026-07-15 AAL2927 - Jul 15, 21:40 UTCJul 16, 02:05 UTC4h 25m
2026-07-15 AAL2927 PHL → PHL Jul 15, 21:25 UTCJul 15, 21:30 UTC5m
2026-07-15 AAL2927 PHL → PHL Jul 15, 20:50 UTCJul 15, 20:55 UTC5m
2026-07-15 AAL2927 PHL → PHL Jul 15, 20:15 UTCJul 15, 20:20 UTC5m
2026-07-15 AAL2927 PHL → PHL Jul 15, 20:00 UTCJul 15, 20:10 UTC10m
2026-07-15 AAL2927 PHL → PHL Jul 15, 19:45 UTCJul 15, 19:50 UTC5m
2026-07-15 AAL2161 - Jul 15, 14:00 UTCJul 15, 19:10 UTC5h 10m
2026-07-15 AAL3166 PHL → SFO Jul 15, 01:03 UTCJul 15, 05:32 UTC4h 29m
2026-07-15 AAL3166 PHL → SFO Jul 15, 00:40 UTCJul 15, 05:35 UTC4h 55m

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 N449AN page for operator, model, and routing details .

Mode-S A56C19 frequently asked

What is Mode-S code A56C19?
A56C19 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N449AN.
Where is Mode-S A56C19 registered?
Mode-S code A56C19 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 A56C19 broadcasting right now?
Yes. Mode-S A56C19 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A56C19, octal 51266031, decimal 10,841,113.
What flights does A56C19 operate?
Mode-S A56C19 has broadcast 20 distinct callsigns, including AAL3202, AAL2239, AAL556, AAL2927, AAL205.