Apparatus

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sensors Mode-S transponder

A56E0D

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N449WN · BOEING 737-700 · operated by SOUTHWEST AIRLINES CO

Hex
A56E0D
Octal
51267015
Decimal
10,841,613
Country
US
Tail
N449WN
Type
B737
No current signal · last broadcast 1h ago
Flights observed
669
Distinct callsigns
20
Country
US
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S A56E0D.

Country allocation

The ICAO 24-bit address A56E0D 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
SWA351 - 8 2026-06-14
SWA3102 Southwest Airlines 7 2026-06-04
SWA169 Southwest Airlines 6 2026-06-02
SWA4500 Southwest Airlines 5 2026-06-16
SWA4133 - 5 2026-06-29
SWA3199 Southwest Airlines 5 2026-06-01
SWA3014 - 5 2026-06-21
SWA246 - 5 2026-06-30
SWA1433 Southwest Airlines 5 2026-06-20
SWA684 Southwest Airlines 4 2026-05-19
SWA496 - 4 2026-07-01
SWA4140 Southwest Airlines 4 2026-05-25
SWA3968 Southwest Airlines 4 2026-05-27
SWA38 Southwest Airlines 4 2026-05-20
SWA3281 Southwest Airlines 4 2026-04-22
SWA322 - 4 2026-06-28
SWA2986 - 4 2026-07-13
SWA2896 Southwest Airlines 4 2026-04-16
SWA2807 Southwest Airlines 4 2026-05-06
SWA2720 Southwest Airlines 4 2026-05-08

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 SWA2567 - Jul 14, 23:40 UTCJul 15, 01:15 UTC1h 35m
2026-07-14 SWA500 DEN → LAX Jul 14, 20:50 UTCJul 14, 22:40 UTC1h 50m
2026-07-14 SWA500 BNA → DEN Jul 14, 17:25 UTCJul 14, 19:35 UTC2h 10m
2026-07-14 SWA500 - Jul 14, 14:30 UTCJul 14, 16:05 UTC1h 35m
2026-07-14 SWA771 TPA → BUF Jul 14, 11:20 UTCJul 14, 13:40 UTC2h 20m
2026-07-14 SWA3023 MSY → TPA Jul 14, 01:35 UTCJul 14, 02:45 UTC1h 10m
2026-07-13 SWA2986 - Jul 13, 23:20 UTCJul 14, 00:40 UTC1h 20m
2026-07-13 SWA2986 SAT → MSY Jul 13, 23:20 UTCJul 14, 00:41 UTC1h 21m
2026-07-13 SWA2986 - Jul 13, 21:55 UTCJul 13, 22:15 UTC20m
2026-07-13 SWA2986 PHX → AUS Jul 13, 18:05 UTCJul 13, 20:30 UTC2h 25m
2026-07-13 SWA3001 SEA → PHX Jul 13, 13:40 UTCJul 13, 16:10 UTC2h 30m
2026-07-13 SWA3125 - Jul 13, 07:10 UTCJul 13, 09:30 UTC2h 20m
2026-07-13 SWA127 LGB → PHX Jul 13, 04:45 UTCJul 13, 05:56 UTC1h 12m
2026-07-13 SWA127 LGB → PHX Jul 13, 04:45 UTCJul 13, 05:55 UTC1h 10m
2026-07-12 SWA127 AUS → LGB Jul 12, 23:50 UTCJul 13, 02:25 UTC2h 35m
2026-07-12 SWA2551 - Jul 12, 20:05 UTCJul 12, 22:40 UTC2h 35m
2026-07-12 SWA2551 LAX → AUS Jul 12, 20:01 UTCJul 12, 22:37 UTC2h 36m
2026-07-12 SWA3136 SMF → LAX Jul 12, 17:35 UTCJul 12, 18:45 UTC1h 10m
2026-07-12 SWA3136 SMF → LAX Jul 12, 17:33 UTCJul 12, 18:35 UTC1h 2m
2026-07-12 SWA4326 LAS → SMF Jul 12, 15:30 UTCJul 12, 16:35 UTC1h 5m
2026-07-12 SWA4326 TPA → LAS Jul 12, 10:10 UTCJul 12, 14:05 UTC3h 55m
2026-07-12 SWA4619 STL → TPA Jul 12, 00:01 UTCJul 12, 01:50 UTC1h 50m
2026-07-11 SWA4619 SEA → STL Jul 11, 19:25 UTCJul 11, 22:40 UTC3h 15m
2026-07-11 SWA2873 PHX → SEA Jul 11, 15:15 UTCJul 11, 17:50 UTC2h 35m
2026-07-11 SWA3608 ALB → TPA Jul 11, 12:10 UTCJul 11, 14:20 UTC2h 10m
2026-07-11 SWA309 SMF → PDX Jul 11, 06:40 UTCJul 11, 07:45 UTC1h 5m
2026-07-11 SWA309 SMF → PDX Jul 11, 06:39 UTCJul 11, 07:41 UTC1h 2m
2026-07-11 SWA854 BUR → SMF Jul 11, 05:01 UTCJul 11, 06:01 UTC1h 0m
2026-07-11 SWA854 BUR → SMF Jul 11, 05:00 UTCJul 11, 05:56 UTC56m
2026-07-11 SWA2755 LAS → ABQ Jul 11, 01:36 UTCJul 11, 02:41 UTC1h 5m
2026-07-10 SWA2755 - Jul 10, 23:30 UTCJul 11, 00:40 UTC1h 10m
2026-07-10 SWA2505 LGB → SMF Jul 10, 21:25 UTCJul 10, 22:25 UTC1h 0m
2026-07-10 SWA2505 - Jul 10, 19:30 UTCJul 10, 20:25 UTC55m
2026-07-10 SWA3207 PDX → PHX Jul 10, 16:25 UTCJul 10, 18:35 UTC2h 10m
2026-07-10 SWA3207 PDX → PHX Jul 10, 16:24 UTCJul 10, 18:33 UTC2h 9m
2026-07-10 SWA3693 SJC → PDX Jul 10, 14:05 UTCJul 10, 15:25 UTC1h 20m
2026-07-10 SWA704 - Jul 10, 04:10 UTCJul 10, 05:10 UTC1h 0m
2026-07-10 SWA704 LAS → SJC Jul 10, 04:06 UTCJul 10, 05:06 UTC1h 0m
2026-07-10 SWA704 - Jul 10, 02:05 UTCJul 10, 03:20 UTC1h 15m
2026-07-09 SWA943 - Jul 9, 23:55 UTCJul 10, 01:05 UTC1h 10m
2026-07-09 SWA4960 SEA → SJC Jul 9, 21:20 UTCJul 9, 23:05 UTC1h 45m
2026-07-09 SWA1739 SMF → SEA Jul 9, 18:35 UTCJul 9, 20:00 UTC1h 25m
2026-07-09 SWA860 LAS → SMF Jul 9, 16:05 UTCJul 9, 17:05 UTC1h 0m
2026-07-09 SWA860 - Jul 9, 13:50 UTCJul 9, 14:55 UTC1h 5m
2026-07-09 SWA4876 - Jul 9, 02:35 UTCJul 9, 03:25 UTC50m
2026-07-09 SWA4876 SAN → TUS Jul 9, 02:30 UTCJul 9, 03:24 UTC54m
2026-07-08 SWA4253 - Jul 8, 21:20 UTCJul 9, 00:55 UTC3h 35m
2026-07-08 SWA749 BUR → BNA Jul 8, 16:40 UTCJul 8, 20:20 UTC3h 40m
2026-07-08 SWA715 - Jul 8, 14:40 UTCJul 8, 15:35 UTC55m
2026-07-08 SWA715 - Jul 8, 12:40 UTCJul 8, 13:45 UTC1h 5m

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 N449WN page for operator, model, and routing details .

Mode-S A56E0D frequently asked

What is Mode-S code A56E0D?
A56E0D is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N449WN.
Where is Mode-S A56E0D registered?
Mode-S code A56E0D 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 A56E0D broadcasting right now?
No active broadcast right now. Last signal was 1h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A56E0D, octal 51267015, decimal 10,841,613.
What flights does A56E0D operate?
Mode-S A56E0D has broadcast 20 distinct callsigns, including SWA351, SWA3102, SWA169, SWA4500, SWA4133.