Apparatus

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sensors Mode-S transponder

A72CA2

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N561WN · BOEING 737-700 · operated by WILMINGTON TRUST CO TRUSTEE

Hex
A72CA2
Octal
51626242
Decimal
10,955,938
Country
US
Tail
N561WN
Type
B737
No current signal · last broadcast 52m ago
Flights observed
652
Distinct callsigns
20
Country
US
Last broadcast
52m ago

Last known position

Most recent position reported by Mode-S A72CA2.

Country allocation

The ICAO 24-bit address A72CA2 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
SWA2137 Southwest Airlines 11 2026-04-17
SWA311 - 5 2026-06-25
SWA2973 - 5 2026-06-22
SWA988 - 4 2026-04-15
SWA739 - 4 2026-07-12
SWA652 Southwest Airlines 4 2026-05-24
SWA510 Southwest Airlines 4 2026-06-09
SWA496 - 4 2026-06-23
SWA4758 - 4 2026-07-08
SWA3850 Southwest Airlines 4 2026-07-08
SWA3604 - 4 2026-07-13
SWA3091 Southwest Airlines 4 2026-04-19
SWA300 - 4 2026-06-22
SWA2407 - 4 2026-07-13
SWA2170 Southwest Airlines 4 2026-05-22
SWA2068 - 4 2026-06-14
SWA1925 Southwest Airlines 4 2026-04-17
SWA1725 Southwest Airlines 4 2026-05-13
SWA1423 - 4 2026-07-01
SWA1049 Southwest Airlines 4 2026-06-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 SWA2805 - Jul 14, 05:05 UTCJul 14, 06:20 UTC1h 15m
2026-07-14 SWA3550 - Jul 14, 03:05 UTCJul 14, 04:10 UTC1h 5m
2026-07-14 SWA3994 - Jul 14, 00:55 UTCJul 14, 02:10 UTC1h 15m
2026-07-13 SWA2407 LAS → STS Jul 13, 22:45 UTCJul 14, 00:00 UTC1h 15m
2026-07-13 SWA2407 LAS → STS Jul 13, 22:45 UTCJul 13, 23:57 UTC1h 12m
2026-07-13 SWA2407 BNA → LAS Jul 13, 18:10 UTCJul 13, 21:15 UTC3h 5m
2026-07-13 SWA2407 MSY → BNA Jul 13, 15:45 UTCJul 13, 17:00 UTC1h 15m
2026-07-13 SWA594 BNA → MSY Jul 13, 13:50 UTCJul 13, 15:00 UTC1h 10m
2026-07-13 SWA594 BNA → MSY Jul 13, 13:46 UTCJul 13, 14:53 UTC1h 7m
2026-07-13 SWA3604 - Jul 13, 11:40 UTCJul 13, 12:15 UTC35m
2026-07-13 SWA3604 SDF → BNA Jul 13, 11:36 UTCJul 13, 12:07 UTC31m
2026-07-13 SWA2339 LAS → SDF Jul 13, 02:45 UTCJul 13, 06:10 UTC3h 25m
2026-07-13 SWA2339 LAS → SDF Jul 13, 02:41 UTCJul 13, 06:07 UTC3h 26m
2026-07-12 SWA2339 SEA → LAS Jul 12, 21:40 UTCJul 12, 23:55 UTC2h 15m
2026-07-12 SWA739 LAS → SEA Jul 12, 18:11 UTCJul 12, 20:09 UTC1h 58m
2026-07-12 SWA739 LAS → SEA Jul 12, 18:10 UTCJul 12, 20:10 UTC2h 0m
2026-07-12 SWA739 - Jul 12, 15:40 UTCJul 12, 16:20 UTC40m
2026-07-12 SWA739 - Jul 12, 13:35 UTCJul 12, 14:35 UTC1h 0m
2026-07-12 SWA346 BUR → SFO Jul 12, 03:45 UTCJul 12, 04:40 UTC55m
2026-07-12 SWA2201 LAS → BUR Jul 12, 01:10 UTCJul 12, 01:55 UTC45m
2026-07-11 SWA4461 - Jul 11, 23:15 UTCJul 12, 00:05 UTC50m
2026-07-11 SWA4461 FAT → LAS Jul 11, 23:08 UTCJul 12, 00:08 UTC1h 1m
2026-07-11 SWA2235 - Jul 11, 21:20 UTCJul 11, 22:05 UTC45m
2026-07-11 SWA2235 LAS → FAT Jul 11, 21:20 UTCJul 11, 22:19 UTC59m
2026-07-11 SWA735 - Jul 11, 17:25 UTCJul 11, 20:00 UTC2h 35m
2026-07-11 SWA735 - Jul 11, 14:45 UTCJul 11, 16:15 UTC1h 30m
2026-07-11 SWA3107 - Jul 11, 11:35 UTCJul 11, 13:35 UTC2h 0m
2026-07-11 SWA4964 TPA → STL Jul 11, 05:20 UTCJul 11, 07:45 UTC2h 25m
2026-07-11 SWA3355 PHX → TPA Jul 11, 00:40 UTCJul 11, 04:25 UTC3h 45m
2026-07-10 SWA1299 PVR → PHX Jul 10, 20:01 UTCJul 10, 22:10 UTC2h 10m
2026-07-10 SWA1299 - Jul 10, 16:50 UTCJul 10, 22:10 UTC5h 20m
2026-07-10 SWA3651 - Jul 10, 02:30 UTCJul 10, 03:55 UTC1h 25m
2026-07-10 SWA3651 SFO → PHX Jul 10, 02:25 UTCJul 10, 03:57 UTC1h 32m
2026-07-10 SWA833 DTW → BNA Jul 10, 00:20 UTCJul 10, 01:20 UTC1h 0m
2026-07-09 SWA4540 LAS → BUR Jul 9, 22:00 UTCJul 9, 22:45 UTC45m
2026-07-09 SWA4540 LAS → BUR Jul 9, 22:00 UTCJul 9, 22:43 UTC43m
2026-07-09 SWA170 - Jul 9, 19:35 UTCJul 9, 20:45 UTC1h 10m
2026-07-09 SWA170 - Jul 9, 17:50 UTCJul 9, 18:40 UTC50m
2026-07-09 SWA4523 AUS → DEN Jul 9, 14:45 UTCJul 9, 16:25 UTC1h 40m
2026-07-09 SWA2093 - Jul 9, 12:25 UTCJul 9, 13:10 UTC45m
2026-07-09 SWA2093 HRL → AUS Jul 9, 12:20 UTCJul 9, 13:08 UTC48m
2026-07-09 SWA950 - Jul 9, 00:55 UTCJul 9, 01:40 UTC45m
2026-07-08 SWA950 - Jul 8, 21:55 UTCJul 8, 23:55 UTC2h 0m
2026-07-08 SWA3850 CMH → MCO Jul 8, 19:35 UTCJul 8, 20:40 UTC1h 5m
2026-07-08 SWA3850 CMH → MCO Jul 8, 16:05 UTCJul 8, 18:45 UTC2h 40m
2026-07-08 SWA528 - Jul 8, 12:05 UTCJul 8, 14:40 UTC2h 35m
2026-07-08 SWA528 MCI → MIA Jul 8, 12:01 UTCJul 8, 14:40 UTC2h 39m
2026-07-08 SWA4758 - Jul 8, 03:50 UTCJul 8, 05:05 UTC1h 15m
2026-07-08 SWA4758 DEN → MCI Jul 8, 03:47 UTCJul 8, 05:01 UTC1h 14m
2026-07-08 SWA2073 PHX → DEN Jul 8, 01:10 UTCJul 8, 02:35 UTC1h 25m

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 N561WN page for operator, model, and routing details .

Mode-S A72CA2 frequently asked

What is Mode-S code A72CA2?
A72CA2 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N561WN.
Where is Mode-S A72CA2 registered?
Mode-S code A72CA2 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 A72CA2 broadcasting right now?
No active broadcast right now. Last signal was 52m ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A72CA2, octal 51626242, decimal 10,955,938.
What flights does A72CA2 operate?
Mode-S A72CA2 has broadcast 20 distinct callsigns, including SWA2137, SWA311, SWA2973, SWA988, SWA739.