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sensors Mode-S transponder

A1433A

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N1801U · operated by SOUTHWEST AIRLINES CO

Hex
A1433A
Octal
50241472
Decimal
10,568,506
Country
US
Tail
N1801U
Type
B38M
No current signal · last broadcast 34m ago
Flights observed
562
Distinct callsigns
20
Country
US
Last broadcast
34m ago

Last known position

Most recent position reported by Mode-S A1433A.

Country allocation

The ICAO 24-bit address A1433A 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
SWA596 Southwest Airlines 5 2026-06-27
SWA3910 - 5 2026-04-14
SWA386 Southwest Airlines 5 2026-05-09
SWA493 Southwest Airlines 4 2026-06-12
SWA4527 Southwest Airlines 4 2026-06-25
SWA446 Southwest Airlines 4 2026-06-08
SWA387 - 4 2026-07-08
SWA3620 Southwest Airlines 4 2026-06-08
SWA2419 - 4 2026-06-29
SWA2257 Southwest Airlines 4 2026-06-03
SWA2050 Southwest Airlines 4 2026-04-13
SWA1138 Southwest Airlines 4 2026-05-14
SWA958 - 3 2026-06-19
SWA3667 - 3 2026-07-09
SWA3274 Southwest Airlines 3 2026-06-05
SWA2731 - 3 2026-06-14
SWA2527 Southwest Airlines 3 2026-04-19
SWA2339 Southwest Airlines 3 2026-05-30
SWA2170 Southwest Airlines 3 2026-06-06
SWA2148 Southwest Airlines 3 2026-06-06

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 SWA1851 - Jul 14, 20:05 UTCJul 14, 20:20 UTC15m
2026-07-14 SWA1919 - Jul 14, 16:30 UTCJul 14, 16:45 UTC15m
2026-07-14 SWA377 - Jul 14, 02:30 UTCJul 14, 07:50 UTC5h 20m
2026-07-14 SWA3053 - Jul 14, 00:00 UTCJul 14, 00:55 UTC55m
2026-07-13 SWA3053 OAK → LAX Jul 13, 23:56 UTCJul 14, 01:00 UTC1h 4m
2026-07-13 SWA4488 LAS → OAK Jul 13, 21:50 UTCJul 13, 22:50 UTC1h 0m
2026-07-13 SWA4672 PDX → LAS Jul 13, 18:20 UTCJul 13, 20:15 UTC1h 55m
2026-07-13 SWA4672 PDX → LAS Jul 13, 18:17 UTCJul 13, 20:10 UTC1h 54m
2026-07-13 SWA1377 DAL → PDX Jul 13, 13:50 UTCJul 13, 17:10 UTC3h 20m
2026-07-13 SWA1377 - Jul 13, 10:35 UTCJul 13, 12:15 UTC1h 40m
2026-07-13 SWA361 AUS → MDW Jul 13, 02:01 UTCJul 13, 04:15 UTC2h 15m
2026-07-12 SWA1140 - Jul 12, 22:15 UTCJul 13, 00:55 UTC2h 40m
2026-07-12 SWA440 - Jul 12, 18:35 UTCJul 12, 20:40 UTC2h 5m
2026-07-12 SWA981 - Jul 12, 14:50 UTCJul 12, 17:25 UTC2h 35m
2026-07-12 SWA981 - Jul 12, 12:30 UTCJul 12, 13:25 UTC55m
2026-07-12 SWA1969 - Jul 12, 03:30 UTCJul 12, 04:30 UTC1h 0m
2026-07-12 SWA1969 SAN → SLC Jul 12, 03:27 UTCJul 12, 04:51 UTC1h 24m
2026-07-12 SWA1139 - Jul 12, 00:01 UTCJul 12, 01:50 UTC1h 50m
2026-07-11 SWA4240 LGB → BZN Jul 11, 19:59 UTCJul 11, 21:57 UTC1h 58m
2026-07-11 SWA4240 - Jul 11, 20:00 UTCJul 12, 00:30 UTC4h 30m
2026-07-11 SWA543 - Jul 11, 17:35 UTCJul 11, 19:00 UTC1h 25m
2026-07-11 SWA3339 PHX → SLC Jul 11, 15:15 UTCJul 11, 16:30 UTC1h 15m
2026-07-11 SWA672 - Jul 11, 10:35 UTCJul 11, 11:50 UTC1h 15m
2026-07-11 SWA672 OGG → PHX Jul 11, 06:32 UTCJul 11, 11:51 UTC5h 20m
2026-07-10 SWA3060 OAK → OGG Jul 10, 21:10 UTCJul 11, 02:13 UTC5h 3m
2026-07-10 SWA3060 - Jul 10, 21:10 UTCJul 10, 21:45 UTC35m
2026-07-10 SWA1713 SEA → OAK Jul 10, 18:00 UTCJul 10, 19:40 UTC1h 40m
2026-07-10 SWA1713 DEN → SEA Jul 10, 14:20 UTCJul 10, 16:40 UTC2h 20m
2026-07-10 SWA173 - Jul 10, 07:10 UTCJul 10, 12:10 UTC5h 0m
2026-07-10 SWA2811 DEN → ANC Jul 10, 00:58 UTCJul 10, 06:00 UTC5h 2m
2026-07-10 SWA2811 DEN → ANC Jul 10, 01:00 UTCJul 10, 06:05 UTC5h 5m
2026-07-09 SWA3667 - Jul 9, 23:05 UTCJul 9, 23:25 UTC20m
2026-07-09 SWA3667 SJC → DEN Jul 9, 20:50 UTCJul 9, 23:25 UTC2h 35m
2026-07-09 SWA3667 SJC → DEN Jul 9, 20:50 UTCJul 9, 22:47 UTC1h 57m
2026-07-09 SWA3752 - Jul 9, 15:25 UTCJul 9, 19:30 UTC4h 5m
2026-07-09 SWA1598 DEN → MDW Jul 9, 12:10 UTCJul 9, 14:05 UTC1h 55m
2026-07-09 SWA3642 - Jul 9, 07:05 UTCJul 9, 09:05 UTC2h 0m
2026-07-09 SWA2541 BNA → SFO Jul 9, 01:25 UTCJul 9, 05:50 UTC4h 25m
2026-07-09 SWA2541 BNA → SFO Jul 9, 01:22 UTCJul 9, 05:43 UTC4h 21m
2026-07-08 SWA387 - Jul 8, 18:45 UTCJul 8, 21:05 UTC2h 20m
2026-07-08 SWA387 CUN → BNA Jul 8, 18:45 UTCJul 8, 21:06 UTC2h 21m
2026-07-08 SWA1607 BWI → CUN Jul 8, 14:20 UTCJul 8, 17:30 UTC3h 10m
2026-07-08 SWA186 ATL → BWI Jul 8, 11:30 UTCJul 8, 12:55 UTC1h 25m
2026-07-08 SWA1542 - Jul 8, 02:50 UTCJul 8, 04:30 UTC1h 40m
2026-07-07 SWA1013 BZE → HOU Jul 7, 20:08 UTCJul 7, 22:10 UTC2h 3m
2026-07-07 SWA1013 - Jul 7, 18:00 UTCJul 7, 22:10 UTC4h 10m
2026-07-07 SWA837 - Jul 7, 16:45 UTCJul 7, 16:55 UTC10m
2026-07-07 SWA2442 - Jul 7, 12:35 UTCJul 7, 14:55 UTC2h 20m
2026-07-07 SWA2442 - Jul 7, 10:50 UTCJul 7, 11:05 UTC15m
2026-07-07 SWA2708 - Jul 7, 05:45 UTCJul 7, 06:00 UTC15m

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 N1801U page for operator, model, and routing details .

Mode-S A1433A frequently asked

What is Mode-S code A1433A?
A1433A is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N1801U.
Where is Mode-S A1433A registered?
Mode-S code A1433A 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 A1433A broadcasting right now?
No active broadcast right now. Last signal was 34m ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A1433A, octal 50241472, decimal 10,568,506.
What flights does A1433A operate?
Mode-S A1433A has broadcast 20 distinct callsigns, including SWA596, SWA3910, SWA386, SWA493, SWA4527.