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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 Jul 26, 21:40 UTC
Flights observed
645
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:40 UTC

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
SWA4112 Southwest Airlines 3 2026-07-24
SWA4012 Southwest Airlines 3 2026-07-26
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

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SWA2889 BUR → OAK Jul 26, 20:30 UTCJul 26, 21:35 UTC1h 5m
2026-07-26 SWA4012 OAK → PDX Jul 26, 16:35 UTCJul 26, 19:10 UTC2h 35m
2026-07-26 SWA3424 COS → SAT Jul 26, 14:20 UTCJul 26, 15:05 UTC45m
2026-07-26 SWA1505 PHX → OAK Jul 26, 03:28 UTCJul 26, 04:42 UTC1h 14m
2026-07-26 SWA1505 PHX → OAK Jul 26, 03:30 UTCJul 26, 04:10 UTC40m
2026-07-25 SWA2367 SFO → LAS Jul 25, 23:43 UTCJul 26, 01:38 UTC1h 56m
2026-07-25 SWA2367 SFO → LAS Jul 25, 23:45 UTCJul 26, 01:40 UTC1h 55m
2026-07-25 SWA389 MSP → BWI Jul 25, 20:05 UTCJul 25, 22:30 UTC2h 25m
2026-07-25 SWA389 MSP → BWI Jul 25, 20:05 UTCJul 25, 22:33 UTC2h 28m
2026-07-25 SWA4856 SLC → BWI Jul 25, 17:55 UTCJul 25, 18:55 UTC1h 0m
2026-07-25 SWA3163 GSP → ATL Jul 25, 15:20 UTCJul 25, 18:30 UTC3h 10m
2026-07-25 SWA3163 GSP → ATL Jul 25, 15:19 UTCJul 25, 16:40 UTC1h 21m
2026-07-25 SWA2514 SJC → ONT Jul 25, 06:30 UTCJul 25, 11:35 UTC5h 5m
2026-07-25 SWA3101 LAS → SJC Jul 25, 00:20 UTCJul 25, 00:35 UTC15m
2026-07-24 SWA1457 LAS → GEG Jul 24, 22:10 UTCJul 24, 22:25 UTC15m
2026-07-24 SWA1457 LAS → GEG Jul 24, 16:45 UTCJul 24, 17:45 UTC1h 0m
2026-07-24 SWA4112 PHX → HOU Jul 24, 09:10 UTCJul 24, 13:49 UTC4h 39m
2026-07-24 SWA4112 PHX → HOU Jul 24, 09:15 UTCJul 24, 10:30 UTC1h 15m
2026-07-24 SWA1575 DAL → LGA Jul 24, 02:55 UTCJul 24, 07:55 UTC5h 0m
2026-07-23 SWA171 MDW → MCO Jul 23, 19:10 UTCJul 23, 23:15 UTC4h 5m
2026-07-23 SWA305 HOU → CUN Jul 23, 15:40 UTCJul 23, 16:15 UTC35m
2026-07-23 SWA305 HOU → CUN Jul 23, 15:35 UTCJul 23, 17:32 UTC1h 57m
2026-07-23 SWA3928 - Jul 23, 12:20 UTCJul 23, 13:55 UTC1h 35m
2026-07-23 SWA2905 LAS → SFO Jul 23, 02:45 UTCJul 23, 03:25 UTC40m
2026-07-22 SWA3226 PDX → DEN Jul 22, 23:10 UTCJul 23, 01:10 UTC2h 0m
2026-07-22 SWA3226 PDX → DEN Jul 22, 23:10 UTCJul 23, 01:05 UTC1h 56m
2026-07-22 SWA4168 OAK → LAX Jul 22, 18:55 UTCJul 22, 21:55 UTC3h 0m
2026-07-22 SWA4168 OAK → LAX Jul 22, 18:51 UTCJul 22, 21:45 UTC2h 54m
2026-07-22 SWA4332 - Jul 22, 16:30 UTCJul 22, 17:40 UTC1h 10m
2026-07-22 SWA1309 - Jul 22, 13:35 UTCJul 22, 14:35 UTC1h 0m
2026-07-22 SWA262 ABQ → DAL Jul 22, 11:20 UTCJul 22, 12:40 UTC1h 20m
2026-07-22 SWA1172 PDX → DEN Jul 22, 01:30 UTCJul 22, 02:50 UTC1h 20m
2026-07-21 SWA2085 ONT → OAK Jul 21, 23:10 UTCJul 22, 00:30 UTC1h 20m
2026-07-21 SWA2085 ONT → OAK Jul 21, 21:15 UTCJul 21, 22:15 UTC1h 0m
2026-07-21 SWA3775 DCA → PVD Jul 21, 18:05 UTCJul 21, 20:05 UTC2h 0m
2026-07-21 SWA192 DAL → SMF Jul 21, 13:55 UTCJul 21, 16:50 UTC2h 55m
2026-07-21 SWA192 ATL → DAL Jul 21, 10:45 UTCJul 21, 12:30 UTC1h 45m
2026-07-21 SWA1472 - Jul 21, 04:05 UTCJul 21, 04:55 UTC50m
2026-07-21 SWA1472 - Jul 21, 02:25 UTCJul 21, 04:00 UTC1h 35m
2026-07-20 SWA4450 SEA → SMF Jul 20, 20:40 UTCJul 20, 23:25 UTC2h 45m
2026-07-20 SWA4450 SEA → SMF Jul 20, 18:45 UTCJul 20, 19:25 UTC40m
2026-07-20 SWA4033 TPA → MDW Jul 20, 15:10 UTCJul 20, 17:20 UTC2h 10m
2026-07-20 SWA3730 - Jul 20, 13:05 UTCJul 20, 14:00 UTC55m
2026-07-20 SWA3730 - Jul 20, 11:25 UTCJul 20, 11:40 UTC15m
2026-07-20 SWA2707 DEN → IND Jul 20, 02:10 UTCJul 20, 02:30 UTC20m
2026-07-20 SWA2707 DEN → IND Jul 20, 00:05 UTCJul 20, 00:40 UTC35m
2026-07-19 SWA1641 AUA → MCO Jul 19, 20:50 UTCJul 19, 21:40 UTC50m
2026-07-19 SWA1641 AUA → MCO Jul 19, 18:55 UTCJul 19, 19:10 UTC15m
2026-07-19 SWA1641 AUA → MCO Jul 19, 18:54 UTCJul 19, 21:35 UTC2h 41m
2026-07-19 SWA1804 BWI → AUA Jul 19, 13:40 UTCJul 19, 16:30 UTC2h 50m

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 Jul 26, 21:40 UTC.
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.