Apparatus

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sensors Mode-S transponder

A2D3B3

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N281WN · BOEING 737-700 · operated by SOUTHWEST AIRLINES CO

Hex
A2D3B3
Octal
50551663
Decimal
10,671,027
Country
US
Tail
N281WN
Type
B737
No current signal · last broadcast Jul 26, 22:05 UTC
Flights observed
728
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:05 UTC

Last known position

Most recent position reported by Mode-S A2D3B3.

Country allocation

The ICAO 24-bit address A2D3B3 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
SWA323 Southwest Airlines 6 2026-06-21
SWA1676 Southwest Airlines 6 2026-05-05
SWA1538 Southwest Airlines 6 2026-05-31
SWA342 Southwest Airlines 5 2026-06-06
SWA881 - 4 2026-06-25
SWA791 Southwest Airlines 4 2026-07-22
SWA684 - 4 2026-07-09
SWA606 - 4 2026-07-04
SWA487 Southwest Airlines 4 2026-06-18
SWA3881 Southwest Airlines 4 2026-06-16
SWA3472 Southwest Airlines 4 2026-05-01
SWA3212 - 4 2026-07-10
SWA312 Southwest Airlines 4 2026-04-16
SWA278 - 4 2026-06-29
SWA2409 Southwest Airlines 4 2026-05-27
SWA2272 Southwest Airlines 4 2026-06-29
SWA203 Southwest Airlines 4 2026-04-25
SWA1920 - 4 2026-07-18
SWA1793 Southwest Airlines 4 2026-05-25
SWA1448 Southwest Airlines 4 2026-05-20

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SWA2693 LGB → SJC Jul 26, 19:50 UTCJul 26, 22:05 UTC2h 15m
2026-07-26 SWA4737 HOU → PHX Jul 26, 15:35 UTCJul 26, 17:40 UTC2h 5m
2026-07-26 SWA4737 HOU → PHX Jul 26, 15:35 UTCJul 26, 17:39 UTC2h 4m
2026-07-26 SWA757 LGA → DAL Jul 26, 13:40 UTCJul 26, 14:25 UTC45m
2026-07-26 SWA2067 STL → CHS Jul 26, 10:50 UTCJul 26, 11:40 UTC50m
2026-07-26 SWA8503 SJC → LAS Jul 26, 03:40 UTCJul 26, 04:25 UTC45m
2026-07-24 SWA758 OAK → LAX Jul 24, 13:15 UTCJul 24, 14:15 UTC1h 0m
2026-07-24 SWA2732 BNA → LAS Jul 24, 10:10 UTCJul 24, 12:10 UTC2h 0m
2026-07-24 SWA2732 BNA → LAS Jul 24, 10:05 UTCJul 24, 12:04 UTC1h 59m
2026-07-24 SWA1668 BWI → BOS Jul 24, 02:40 UTCJul 24, 03:45 UTC1h 5m
2026-07-24 SWA1668 BWI → BOS Jul 24, 02:39 UTCJul 24, 03:38 UTC59m
2026-07-23 SWA2986 BUR → OAK Jul 23, 23:15 UTCJul 24, 01:40 UTC2h 25m
2026-07-23 SWA2986 BUR → OAK Jul 23, 20:55 UTCJul 23, 22:05 UTC1h 10m
2026-07-23 SWA2986 BUR → OAK Jul 23, 18:15 UTCJul 23, 20:00 UTC1h 45m
2026-07-23 SWA3403 PWM → BWI Jul 23, 03:55 UTCJul 23, 04:50 UTC55m
2026-07-23 SWA954 MEM → DAL Jul 23, 02:15 UTCJul 23, 03:00 UTC45m
2026-07-22 SWA791 SJC → LAX Jul 22, 23:15 UTCJul 23, 00:00 UTC45m
2026-07-22 SWA791 SJC → LAX Jul 22, 23:14 UTCJul 22, 23:53 UTC39m
2026-07-22 SWA3755 DEN → DSM Jul 22, 18:30 UTCJul 22, 22:15 UTC3h 45m
2026-07-22 SWA3755 DEN → DSM Jul 22, 18:25 UTCJul 22, 22:10 UTC3h 45m
2026-07-22 SWA1373 OAK → LGB Jul 22, 16:35 UTCJul 22, 17:20 UTC45m
2026-07-22 SWA1373 OAK → LGB Jul 22, 16:34 UTCJul 22, 17:18 UTC44m
2026-07-22 SWA1373 OAK → LGB Jul 22, 14:00 UTCJul 22, 15:30 UTC1h 30m
2026-07-22 SWA1138 CVG → MDW Jul 22, 11:10 UTCJul 22, 12:50 UTC1h 40m
2026-07-22 SWA1138 CVG → MDW Jul 22, 10:29 UTCJul 22, 12:46 UTC2h 17m
2026-07-22 SWA4569 BWI → PVD Jul 22, 01:15 UTCJul 22, 03:10 UTC1h 55m
2026-07-21 SWA1133 SNA → SJC Jul 21, 23:10 UTCJul 22, 00:00 UTC50m
2026-07-21 SWA1133 SNA → SJC Jul 21, 22:39 UTCJul 21, 23:58 UTC1h 19m
2026-07-21 SWA178 ALB → MCO Jul 21, 19:40 UTCJul 21, 20:20 UTC40m
2026-07-21 SWA178 ALB → MCO Jul 21, 19:39 UTCJul 21, 20:51 UTC1h 12m
2026-07-21 SWA11 - Jul 21, 16:35 UTCJul 21, 18:30 UTC1h 55m
2026-07-21 SWA11 HOU → DEN Jul 21, 16:32 UTCJul 21, 18:28 UTC1h 57m
2026-07-21 SWA11 DAL → HOU Jul 21, 14:35 UTCJul 21, 15:25 UTC50m
2026-07-21 SWA3916 STL → BWI Jul 21, 13:00 UTCJul 21, 13:50 UTC50m
2026-07-21 SWA1265 DAL → AUS Jul 21, 11:10 UTCJul 21, 11:40 UTC30m
2026-07-21 SWA4763 SAN → BOI Jul 21, 03:50 UTCJul 21, 05:30 UTC1h 40m
2026-07-21 SWA4763 SAN → BOI Jul 21, 03:49 UTCJul 21, 05:34 UTC1h 45m
2026-07-21 SWA4626 BWI → ATL Jul 21, 01:30 UTCJul 21, 02:45 UTC1h 15m
2026-07-20 SWA184 MDW → MSY Jul 20, 21:20 UTCJul 21, 00:10 UTC2h 49m
2026-07-20 SWA1433 SAN → OAK Jul 20, 17:40 UTCJul 20, 20:05 UTC2h 25m
2026-07-20 SWA1908 MCO → DCA Jul 20, 13:55 UTCJul 20, 16:00 UTC2h 5m
2026-07-20 SWA1908 MCO → DCA Jul 20, 13:52 UTCJul 20, 15:54 UTC2h 2m
2026-07-20 SWA212 AUS → BNA Jul 20, 11:55 UTCJul 20, 12:55 UTC1h 0m
2026-07-20 SWA2179 LAS → ATL Jul 20, 06:15 UTCJul 20, 09:55 UTC3h 40m
2026-07-20 SWA4753 BUR → SJC Jul 20, 00:45 UTCJul 20, 04:00 UTC3h 15m
2026-07-19 SWA4706 LGB → SMF Jul 19, 20:45 UTCJul 20, 00:00 UTC3h 15m
2026-07-19 SWA3129 BUR → LAS Jul 19, 18:45 UTCJul 19, 19:30 UTC45m
2026-07-19 SWA2590 SJC → BUR Jul 19, 16:45 UTCJul 19, 17:35 UTC50m
2026-07-19 SWA332 - Jul 19, 15:00 UTCJul 19, 15:45 UTC45m
2026-07-19 SWA332 - Jul 19, 11:25 UTCJul 19, 14:00 UTC2h 35m

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 N281WN page for operator, model, and routing details .

Mode-S A2D3B3 frequently asked

What is Mode-S code A2D3B3?
A2D3B3 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N281WN.
Where is Mode-S A2D3B3 registered?
Mode-S code A2D3B3 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 A2D3B3 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:05 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A2D3B3, octal 50551663, decimal 10,671,027.
What flights does A2D3B3 operate?
Mode-S A2D3B3 has broadcast 20 distinct callsigns, including SWA323, SWA1676, SWA1538, SWA342, SWA881.