Apparatus

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sensors Mode-S transponder

AD1A4E

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N943WN · BOEING 737-700 · operated by SOUTHWEST AIRLINES CO

Hex
AD1A4E
Octal
53215116
Decimal
11,344,462
Country
US
Tail
N943WN
Type
B737
No current signal · last broadcast Jul 26, 21:20 UTC
Flights observed
764
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:20 UTC

Last known position

Most recent position reported by Mode-S AD1A4E.

Country allocation

The ICAO 24-bit address AD1A4E 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
SWA2384 - 7 2026-07-16
SWA411 - 6 2026-06-15
SWA250 - 6 2026-06-17
SWA2274 - 6 2026-07-07
SWA3652 Southwest Airlines 5 2026-05-26
SWA2392 Southwest Airlines 5 2026-06-07
SWA1604 Southwest Airlines 5 2026-04-16
SWA149 - 5 2026-06-24
SWA1083 Southwest Airlines 5 2026-05-30
SWA915 Southwest Airlines 4 2026-05-16
SWA803 - 4 2026-07-15
SWA3913 Southwest Airlines 4 2026-04-20
SWA3828 - 4 2026-04-15
SWA3237 Southwest Airlines 4 2026-07-05
SWA3144 Southwest Airlines 4 2026-05-26
SWA309 Southwest Airlines 4 2026-06-13
SWA30 - 4 2026-06-20
SWA2866 Southwest Airlines 4 2026-06-15
SWA2743 Southwest Airlines 4 2026-04-19
SWA1552 Southwest Airlines 4 2026-04-24

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SWA2896 PHX → ORD Jul 26, 18:45 UTCJul 26, 21:20 UTC2h 35m
2026-07-26 SWA3008 BWI → BUF Jul 26, 15:05 UTCJul 26, 17:40 UTC2h 35m
2026-07-26 SWA594 BWI → BOS Jul 26, 13:00 UTCJul 26, 14:00 UTC1h 0m
2026-07-26 SWA4705 MCI → PHX Jul 26, 11:05 UTCJul 26, 11:50 UTC45m
2026-07-25 SWA4437 SFO → LAS Jul 25, 23:55 UTCJul 26, 00:50 UTC55m
2026-07-25 SWA1456 BWI → MDW Jul 25, 21:45 UTCJul 25, 22:35 UTC50m
2026-07-25 SWA1456 BWI → MDW Jul 25, 21:41 UTCJul 25, 22:30 UTC50m
2026-07-25 SWA4355 BUR → OAK Jul 25, 20:00 UTCJul 25, 20:55 UTC55m
2026-07-25 SWA4355 BUR → OAK Jul 25, 17:30 UTCJul 25, 19:10 UTC1h 40m
2026-07-25 SWA4355 BUR → OAK Jul 25, 15:45 UTCJul 25, 16:35 UTC50m
2026-07-25 SWA1785 LAS → SFO Jul 25, 12:55 UTCJul 25, 14:05 UTC1h 10m
2026-07-25 SWA1937 OAK → SEA Jul 25, 01:15 UTCJul 25, 02:40 UTC1h 25m
2026-07-24 SWA4401 OAK → ABQ Jul 24, 21:10 UTCJul 25, 00:15 UTC3h 5m
2026-07-24 SWA4401 OAK → ABQ Jul 24, 21:10 UTCJul 25, 00:07 UTC2h 57m
2026-07-24 SWA4731 MDW → MSY Jul 24, 17:55 UTCJul 24, 19:45 UTC1h 50m
2026-07-24 SWA445 DEN → ICT Jul 24, 15:40 UTCJul 24, 16:50 UTC1h 10m
2026-07-24 SWA4459 LAS → OKC Jul 24, 12:15 UTCJul 24, 14:40 UTC2h 25m
2026-07-24 SWA4459 LAS → OKC Jul 24, 12:11 UTCJul 24, 14:39 UTC2h 28m
2026-07-24 SWA352 SJC → SNA Jul 24, 02:14 UTCJul 24, 03:45 UTC1h 31m
2026-07-23 SWA352 SJC → SNA Jul 23, 22:50 UTCJul 24, 01:10 UTC2h 20m
2026-07-23 SWA352 SJC → SNA Jul 23, 21:25 UTCJul 23, 21:55 UTC30m
2026-07-23 SWA29 HOU → IND Jul 23, 18:45 UTCJul 23, 19:30 UTC45m
2026-07-23 SWA29 HOU → IND Jul 23, 16:40 UTCJul 23, 17:35 UTC55m
2026-07-23 SWA2022 DEN → OAK Jul 23, 14:40 UTCJul 23, 15:35 UTC55m
2026-07-23 SWA4702 PDX → STL Jul 23, 12:00 UTCJul 23, 13:20 UTC1h 20m
2026-07-23 SWA931 SFO → BUR Jul 23, 04:40 UTCJul 23, 05:10 UTC30m
2026-07-23 SWA931 SFO → BUR Jul 23, 04:35 UTCJul 23, 05:28 UTC53m
2026-07-23 SWA2136 PVD → RSW Jul 23, 00:40 UTCJul 23, 03:50 UTC3h 10m
2026-07-22 SWA2136 PVD → RSW Jul 22, 21:40 UTCJul 22, 23:40 UTC2h 0m
2026-07-22 SWA3611 SJC → LAX Jul 22, 17:50 UTCJul 22, 20:10 UTC2h 20m
2026-07-22 SWA2977 MSY → AUS Jul 22, 15:50 UTCJul 22, 16:50 UTC1h 0m
2026-07-22 SWA2977 - Jul 22, 12:30 UTCJul 22, 14:50 UTC2h 20m
2026-07-22 SWA113 LAS → BWI Jul 22, 05:20 UTCJul 22, 09:15 UTC3h 55m
2026-07-21 SWA1808 SJC → AUS Jul 21, 23:45 UTCJul 22, 03:25 UTC3h 40m
2026-07-21 SWA1951 GEG → LAS Jul 21, 20:45 UTCJul 21, 22:45 UTC2h 0m
2026-07-21 SWA365 ONT → OAK Jul 21, 18:20 UTCJul 21, 19:45 UTC1h 25m
2026-07-21 SWA365 ONT → OAK Jul 21, 16:15 UTCJul 21, 17:10 UTC55m
2026-07-21 SWA4843 SJC → BUR Jul 21, 14:25 UTCJul 21, 15:15 UTC50m
2026-07-21 SWA4884 SLC → OAK Jul 21, 04:00 UTCJul 21, 04:40 UTC40m
2026-07-21 SWA4667 MCO → SYR Jul 21, 02:00 UTCJul 21, 03:00 UTC1h 0m
2026-07-20 SWA839 LAX → OAK Jul 20, 03:50 UTCJul 20, 04:55 UTC1h 5m
2026-07-20 SWA839 LAX → OAK Jul 20, 03:48 UTCJul 20, 04:52 UTC1h 4m
2026-07-20 SWA2202 LAS → BUR Jul 20, 02:10 UTCJul 20, 02:50 UTC40m
2026-07-19 SWA2155 - Jul 19, 23:50 UTCJul 20, 00:45 UTC55m
2026-07-19 SWA2155 RNO → LAS Jul 19, 23:45 UTCJul 20, 00:38 UTC53m
2026-07-19 SWA2125 SNA → DEN Jul 19, 21:35 UTCJul 19, 22:35 UTC1h 0m
2026-07-19 SWA2125 SNA → DEN Jul 19, 21:35 UTCJul 19, 22:32 UTC57m
2026-07-19 SWA4286 DEN → LAS Jul 19, 19:08 UTCJul 19, 20:29 UTC1h 22m
2026-07-19 SWA4286 DEN → LAS Jul 19, 19:10 UTCJul 19, 20:30 UTC1h 20m
2026-07-19 SWA1576 BWI → DEN Jul 19, 02:50 UTCJul 19, 06:10 UTC3h 20m

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 N943WN page for operator, model, and routing details .

Mode-S AD1A4E frequently asked

What is Mode-S code AD1A4E?
AD1A4E is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N943WN.
Where is Mode-S AD1A4E registered?
Mode-S code AD1A4E 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 AD1A4E broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:20 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AD1A4E, octal 53215116, decimal 11,344,462.
What flights does AD1A4E operate?
Mode-S AD1A4E has broadcast 20 distinct callsigns, including SWA2384, SWA411, SWA250, SWA2274, SWA3652.