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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 2h ago
Flights observed
672
Distinct callsigns
20
Country
US
Last broadcast
2h ago

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
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
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
SWA1476 Southwest Airlines 4 2026-05-14
SWA1433 Southwest Airlines 4 2026-05-23

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 SWA1668 - Jul 14, 03:10 UTCJul 14, 04:10 UTC1h 0m
2026-07-14 SWA9013 - Jul 14, 00:00 UTCJul 14, 02:10 UTC2h 10m
2026-07-13 SWA2670 MCO → MSY Jul 13, 21:41 UTCJul 13, 23:00 UTC1h 19m
2026-07-13 SWA2670 MCO → MSY Jul 13, 21:45 UTCJul 13, 23:05 UTC1h 20m
2026-07-13 SWA1031 - Jul 13, 17:15 UTCJul 13, 19:15 UTC2h 0m
2026-07-13 SWA1031 - Jul 13, 15:20 UTCJul 13, 16:10 UTC50m
2026-07-13 SWA732 BOS → BWI Jul 13, 13:10 UTCJul 13, 14:10 UTC1h 0m
2026-07-13 SWA732 BOS → BWI Jul 13, 13:08 UTCJul 13, 14:07 UTC59m
2026-07-13 SWA883 - Jul 13, 10:45 UTCJul 13, 11:45 UTC1h 0m
2026-07-13 SWA883 BWI → BOS Jul 13, 10:43 UTCJul 13, 11:48 UTC1h 5m
2026-07-13 SWA1888 - Jul 13, 02:25 UTCJul 13, 05:01 UTC2h 35m
2026-07-12 SWA1184 - Jul 12, 23:10 UTCJul 13, 01:35 UTC2h 25m
2026-07-12 SWA1184 MDW → CMH Jul 12, 20:50 UTCJul 12, 21:30 UTC40m
2026-07-12 SWA4996 LGA → MDW Jul 12, 17:45 UTCJul 12, 19:30 UTC1h 45m
2026-07-12 SWA3827 - Jul 12, 14:15 UTCJul 12, 16:10 UTC1h 55m
2026-07-12 SWA3827 STL → LGA Jul 12, 14:15 UTCJul 12, 16:14 UTC1h 59m
2026-07-12 SWA1109 - Jul 12, 11:30 UTCJul 12, 13:10 UTC1h 40m
2026-07-12 SWA1501 - Jul 12, 06:35 UTCJul 12, 09:35 UTC3h 0m
2026-07-12 SWA4247 SJC → DEN Jul 12, 03:35 UTCJul 12, 05:40 UTC2h 5m
2026-07-12 SWA3541 SAN → SJC Jul 12, 00:19 UTCJul 12, 01:17 UTC58m
2026-07-12 SWA3541 SAN → SJC Jul 12, 00:20 UTCJul 12, 01:20 UTC1h 0m
2026-07-11 SWA4770 OAK → SAN Jul 11, 21:55 UTCJul 11, 23:10 UTC1h 15m
2026-07-11 SWA4196 PHX → OAK Jul 11, 19:15 UTCJul 11, 20:40 UTC1h 25m
2026-07-11 SWA4019 - Jul 11, 17:10 UTCJul 11, 18:05 UTC55m
2026-07-11 SWA3489 SJC → SAN Jul 11, 14:14 UTCJul 11, 15:20 UTC1h 6m
2026-07-11 SWA3489 SJC → SAN Jul 11, 14:15 UTCJul 11, 15:20 UTC1h 5m
2026-07-10 SWA3538 - Jul 10, 22:15 UTCJul 10, 23:15 UTC1h 0m
2026-07-10 SWA3454 - Jul 10, 20:05 UTCJul 10, 21:20 UTC1h 15m
2026-07-10 SWA339 - Jul 10, 16:30 UTCJul 10, 17:20 UTC50m
2026-07-10 SWA4245 - Jul 10, 14:15 UTCJul 10, 15:20 UTC1h 5m
2026-07-10 SWA982 - Jul 10, 01:45 UTCJul 10, 03:55 UTC2h 10m
2026-07-10 SWA982 HOU → PHX Jul 10, 01:42 UTCJul 10, 03:51 UTC2h 10m
2026-07-09 SWA452 - Jul 9, 22:05 UTCJul 10, 00:55 UTC2h 50m
2026-07-09 SWA452 DEN → SLC Jul 9, 14:00 UTCJul 9, 15:05 UTC1h 5m
2026-07-09 SWA3127 - Jul 9, 11:25 UTCJul 9, 12:35 UTC1h 10m
2026-07-09 SWA4912 STL → OMA Jul 9, 02:25 UTCJul 9, 03:55 UTC1h 30m
2026-07-08 SWA3387 PIT → STL Jul 8, 23:50 UTCJul 9, 01:10 UTC1h 20m
2026-07-08 SWA3387 PIT → STL Jul 8, 23:50 UTCJul 9, 01:06 UTC1h 16m
2026-07-08 SWA1850 - Jul 8, 21:40 UTCJul 8, 22:45 UTC1h 5m
2026-07-08 SWA1850 - Jul 8, 18:50 UTCJul 8, 20:35 UTC1h 45m
2026-07-08 SWA4938 - Jul 8, 15:30 UTCJul 8, 17:50 UTC2h 20m
2026-07-08 SWA1751 DEN → STL Jul 8, 12:40 UTCJul 8, 14:20 UTC1h 40m
2026-07-08 SWA4152 - Jul 8, 03:20 UTCJul 8, 05:15 UTC1h 55m
2026-07-08 SWA4152 SAN → DEN Jul 8, 03:19 UTCJul 8, 05:13 UTC1h 54m
2026-07-08 SWA1845 - Jul 8, 01:35 UTCJul 8, 02:20 UTC45m
2026-07-07 SWA2235 - Jul 7, 23:00 UTCJul 7, 23:45 UTC45m
2026-07-07 SWA2274 - Jul 7, 21:10 UTCJul 7, 22:00 UTC50m
2026-07-07 SWA2274 - Jul 7, 18:10 UTCJul 7, 20:10 UTC2h 0m
2026-07-07 SWA2274 - Jul 7, 15:40 UTCJul 7, 16:50 UTC1h 10m
2026-07-07 SWA4490 - Jul 7, 13:35 UTCJul 7, 14:35 UTC1h 0m

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 2h ago.
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 SWA411, SWA250, SWA2274, SWA3652, SWA2392.