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sensors Mode-S transponder

A56A56

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N448WN · BOEING 737-700 · operated by SOUTHWEST AIRLINES CO

Hex
A56A56
Octal
51265126
Decimal
10,840,662
Country
US
Tail
N448WN
Type
B737
No current signal · last broadcast 2h ago
Flights observed
667
Distinct callsigns
20
Country
US
Last broadcast
2h ago

Last known position

Most recent position reported by Mode-S A56A56.

Country allocation

The ICAO 24-bit address A56A56 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
SWA1219 Southwest Airlines 6 2026-05-01
SWA9002 Southwest Airlines 4 2026-05-21
SWA482 - 4 2026-07-15
SWA3643 Southwest Airlines 4 2026-05-15
SWA3546 Southwest Airlines 4 2026-04-29
SWA3489 - 4 2026-04-13
SWA2741 - 4 2026-07-11
SWA2660 Southwest Airlines 4 2026-04-18
SWA2536 Southwest Airlines 4 2026-05-26
SWA2324 Southwest Airlines 4 2026-05-22
SWA1914 Southwest Airlines 4 2026-04-29
SWA170 Southwest Airlines 4 2026-06-27
SWA1654 Southwest Airlines 4 2026-04-27
SWA1563 - 4 2026-07-10
SWA138 Southwest Airlines 4 2026-06-09
SWA1311 - 4 2026-04-13
SWA121 Southwest Airlines 4 2026-06-09
SWA771 - 3 2026-07-04
SWA684 Southwest Airlines 3 2026-06-10
SWA599 Southwest Airlines 3 2026-04-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-15 SWA482 STL → BNA Jul 15, 00:00 UTCJul 15, 00:45 UTC45m
2026-07-14 SWA482 AUS → STL Jul 14, 21:30 UTCJul 14, 23:20 UTC1h 49m
2026-07-14 SWA932 - Jul 14, 18:45 UTCJul 14, 20:15 UTC1h 30m
2026-07-14 SWA2621 - Jul 14, 16:35 UTCJul 14, 17:50 UTC1h 15m
2026-07-14 SWA1901 - Jul 14, 14:30 UTCJul 14, 14:50 UTC20m
2026-07-14 SWA3086 - Jul 14, 00:35 UTCJul 14, 00:50 UTC15m
2026-07-13 SWA3086 - Jul 13, 21:25 UTCJul 13, 23:20 UTC1h 55m
2026-07-13 SWA3086 - Jul 13, 19:10 UTCJul 13, 20:20 UTC1h 10m
2026-07-13 SWA3849 - Jul 13, 17:10 UTCJul 13, 18:05 UTC55m
2026-07-13 SWA3348 - Jul 13, 15:25 UTCJul 13, 16:15 UTC50m
2026-07-13 SWA3348 PHX → SNA Jul 13, 15:22 UTCJul 13, 16:14 UTC52m
2026-07-13 SWA4145 - Jul 13, 12:40 UTCJul 13, 14:15 UTC1h 35m
2026-07-13 SWA2932 BUR → SFO Jul 13, 05:45 UTCJul 13, 06:35 UTC50m
2026-07-13 SWA2932 BUR → SFO Jul 13, 05:43 UTCJul 13, 06:32 UTC49m
2026-07-13 SWA2883 ABQ → BUR Jul 13, 02:20 UTCJul 13, 03:50 UTC1h 30m
2026-07-13 SWA2883 ABQ → BUR Jul 13, 02:16 UTCJul 13, 03:46 UTC1h 30m
2026-07-12 SWA758 BUR → ABQ Jul 12, 23:45 UTCJul 13, 01:25 UTC1h 40m
2026-07-12 SWA758 MDW → BUF Jul 12, 23:45 UTCJul 13, 01:21 UTC1h 36m
2026-07-12 SWA3763 DEN → BUR Jul 12, 21:00 UTCJul 12, 22:55 UTC1h 55m
2026-07-12 SWA3763 DEN → BUR Jul 12, 20:58 UTCJul 12, 22:52 UTC1h 54m
2026-07-12 SWA4284 SFO → DEN Jul 12, 17:15 UTCJul 12, 19:15 UTC2h 0m
2026-07-12 SWA4284 SFO → DEN Jul 12, 17:11 UTCJul 12, 19:10 UTC1h 59m
2026-07-12 SWA827 BUR → SFO Jul 12, 15:25 UTCJul 12, 16:20 UTC55m
2026-07-12 SWA3967 - Jul 12, 03:15 UTCJul 12, 04:10 UTC55m
2026-07-12 SWA791 LAS → SMF Jul 12, 01:30 UTCJul 12, 02:35 UTC1h 5m
2026-07-11 SWA791 BUR → LAS Jul 11, 22:50 UTCJul 11, 23:35 UTC45m
2026-07-11 SWA2741 - Jul 11, 18:20 UTCJul 11, 22:01 UTC3h 40m
2026-07-11 SWA2741 MDW → BUR Jul 11, 18:16 UTCJul 11, 21:56 UTC3h 40m
2026-07-11 SWA2741 - Jul 11, 16:00 UTCJul 11, 17:10 UTC1h 10m
2026-07-11 SWA2741 - Jul 11, 13:15 UTCJul 11, 14:50 UTC1h 35m
2026-07-11 SWA4182 - Jul 11, 09:55 UTCJul 11, 11:50 UTC1h 55m
2026-07-11 SWA873 LAS → CMH Jul 11, 02:30 UTCJul 11, 05:50 UTC3h 20m
2026-07-10 SWA1563 - Jul 10, 23:30 UTCJul 11, 01:30 UTC2h 0m
2026-07-10 SWA1563 DEN → LAS Jul 10, 23:27 UTCJul 11, 01:25 UTC1h 58m
2026-07-10 SWA1563 - Jul 10, 20:55 UTCJul 10, 22:20 UTC1h 25m
2026-07-10 SWA1563 - Jul 10, 18:15 UTCJul 10, 19:50 UTC1h 35m
2026-07-10 SWA1067 RDU → AUS Jul 10, 14:30 UTCJul 10, 17:05 UTC2h 35m
2026-07-10 SWA1067 - Jul 10, 12:35 UTCJul 10, 13:20 UTC45m
2026-07-10 SWA2141 - Jul 10, 10:20 UTCJul 10, 11:20 UTC1h 0m
2026-07-10 SWA2141 ISP → BWI Jul 10, 10:19 UTCJul 10, 11:13 UTC55m
2026-07-10 SWA4321 - Jul 10, 04:05 UTCJul 10, 04:45 UTC40m
2026-07-10 SWA478 - Jul 10, 02:05 UTCJul 10, 03:00 UTC55m
2026-07-09 SWA478 - Jul 9, 22:30 UTCJul 9, 23:15 UTC45m
2026-07-09 SWA478 - Jul 9, 19:40 UTCJul 9, 21:15 UTC1h 35m
2026-07-09 SWA3395 - Jul 9, 17:10 UTCJul 9, 18:20 UTC1h 10m
2026-07-09 SWA3796 - Jul 9, 14:45 UTCJul 9, 16:05 UTC1h 20m
2026-07-09 SWA3796 - Jul 9, 11:55 UTCJul 9, 13:40 UTC1h 45m
2026-07-09 SWA2469 LGA → MDW Jul 9, 02:35 UTCJul 9, 04:20 UTC1h 45m
2026-07-09 SWA2469 LGA → MDW Jul 9, 02:34 UTCJul 9, 04:14 UTC1h 41m
2026-07-08 SWA1276 - Jul 8, 22:15 UTCJul 9, 01:25 UTC3h 10m

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 N448WN page for operator, model, and routing details .

Mode-S A56A56 frequently asked

What is Mode-S code A56A56?
A56A56 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N448WN.
Where is Mode-S A56A56 registered?
Mode-S code A56A56 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 A56A56 broadcasting right now?
No active broadcast right now. Last signal was 2h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A56A56, octal 51265126, decimal 10,840,662.
What flights does A56A56 operate?
Mode-S A56A56 has broadcast 20 distinct callsigns, including SWA1219, SWA9002, SWA482, SWA3643, SWA3546.