Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A1440C

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N1807U · BOEING 737 MAX 8 · operated by SOUTHWEST AIRLINES CO

Hex
A1440C
Octal
50242014
Decimal
10,568,716
Country
US
Tail
N1807U
Type
B38M
No current signal · last broadcast 1h ago
Flights observed
563
Distinct callsigns
20
Country
US
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S A1440C.

Country allocation

The ICAO 24-bit address A1440C 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
SWA3288 Southwest Airlines 6 2026-04-18
SWA4074 Southwest Airlines 5 2026-06-03
SWA3263 Southwest Airlines 5 2026-05-31
SWA468 - 4 2026-06-26
SWA3246 - 4 2026-06-26
SWA305 - 4 2026-07-13
SWA2848 Southwest Airlines 4 2026-06-02
SWA2691 Southwest Airlines 4 2026-06-03
SWA2261 Southwest Airlines 4 2026-06-03
SWA1661 - 4 2026-04-13
SWA1086 Southwest Airlines 4 2026-05-09
SWA691 - 3 2026-07-02
SWA4203 - 3 2026-07-04
SWA3977 - 3 2026-04-14
SWA3954 Southwest Airlines 3 2026-05-30
SWA387 Southwest Airlines 3 2026-04-17
SWA3840 Southwest Airlines 3 2026-04-30
SWA3821 Southwest Airlines 3 2026-05-28
SWA3783 Southwest Airlines 3 2026-06-08
SWA3781 - 3 2026-07-11

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-15 SWA3837 SMF → SNA Jul 15, 03:55 UTCJul 15, 05:00 UTC1h 5m
2026-07-15 SWA4897 - Jul 15, 02:05 UTCJul 15, 03:05 UTC1h 0m
2026-07-14 SWA3650 - Jul 14, 23:55 UTCJul 15, 01:05 UTC1h 10m
2026-07-14 SWA8515 LAS → SMF Jul 14, 21:55 UTCJul 14, 22:55 UTC59m
2026-07-13 SWA171 CUN → LAS Jul 13, 19:25 UTCJul 13, 23:40 UTC4h 15m
2026-07-13 SWA305 - Jul 13, 16:05 UTCJul 13, 17:50 UTC1h 45m
2026-07-13 SWA305 HOU → CUN Jul 13, 16:02 UTCJul 13, 17:43 UTC1h 41m
2026-07-13 SWA3928 - Jul 13, 12:25 UTCJul 13, 14:10 UTC1h 45m
2026-07-13 SWA1875 - Jul 13, 02:20 UTCJul 13, 04:35 UTC2h 15m
2026-07-13 SWA1875 FLL → STL Jul 13, 02:16 UTCJul 13, 04:38 UTC2h 23m
2026-07-12 SWA3359 PIT → ATL Jul 12, 22:54 UTCJul 13, 01:12 UTC2h 18m
2026-07-12 SWA3359 STL → FLL Jul 12, 22:55 UTCJul 13, 01:15 UTC2h 20m
2026-07-12 SWA140 SEA → STL Jul 12, 18:28 UTCJul 12, 21:45 UTC3h 17m
2026-07-12 SWA140 SEA → STL Jul 12, 18:30 UTCJul 12, 21:50 UTC3h 20m
2026-07-12 SWA140 SJC → SEA Jul 12, 15:20 UTCJul 12, 17:01 UTC1h 40m
2026-07-12 SWA833 - Jul 12, 13:25 UTCJul 12, 14:10 UTC45m
2026-07-11 SWA3342 - Jul 11, 22:30 UTCJul 11, 22:45 UTC15m
2026-07-11 SWA3342 HNL → ONT Jul 11, 22:26 UTCJul 12, 03:32 UTC5h 6m
2026-07-11 SWA3781 - Jul 11, 20:30 UTCJul 11, 20:40 UTC10m
2026-07-11 SWA3781 - Jul 11, 15:45 UTCJul 11, 16:25 UTC40m
2026-07-11 SWA3781 SMF → HNL Jul 11, 15:42 UTCJul 11, 20:39 UTC4h 57m
2026-07-11 SWA3165 - Jul 11, 13:00 UTCJul 11, 14:00 UTC1h 0m
2026-07-11 SWA2135 LAS → ONT Jul 11, 05:40 UTCJul 11, 06:15 UTC35m
2026-07-11 SWA1566 - Jul 11, 03:15 UTCJul 11, 04:40 UTC1h 25m
2026-07-10 SWA1974 - Jul 10, 23:15 UTCJul 11, 01:45 UTC2h 30m
2026-07-10 SWA2998 - Jul 10, 21:15 UTCJul 10, 22:00 UTC45m
2026-07-10 SWA234 ATL → MSY Jul 10, 19:10 UTCJul 10, 20:10 UTC1h 0m
2026-07-10 SWA234 ATL → MSY Jul 10, 19:07 UTCJul 10, 20:08 UTC1h 1m
2026-07-10 SWA3359 - Jul 10, 16:35 UTCJul 10, 17:50 UTC1h 15m
2026-07-10 SWA1052 - Jul 10, 14:55 UTCJul 10, 15:35 UTC40m
2026-07-10 SWA1500 DEN → BWI Jul 10, 03:46 UTCJul 10, 07:02 UTC3h 16m
2026-07-10 SWA1500 DEN → BWI Jul 10, 03:50 UTCJul 10, 06:55 UTC3h 5m
2026-07-09 SWA1018 CUN → DEN Jul 9, 21:25 UTCJul 10, 01:25 UTC4h 0m
2026-07-09 SWA1735 - Jul 9, 15:35 UTCJul 9, 19:00 UTC3h 25m
2026-07-09 SWA1735 PHX → CUN Jul 9, 15:34 UTCJul 9, 19:22 UTC3h 48m
2026-07-09 SWA4287 - Jul 9, 11:50 UTCJul 9, 13:55 UTC2h 5m
2026-07-09 SWA1939 BNA → OKC Jul 9, 04:35 UTCJul 9, 06:35 UTC2h 0m
2026-07-08 SWA180 - Jul 8, 21:40 UTCJul 9, 01:30 UTC3h 50m
2026-07-08 SWA131 DEN → CUN Jul 8, 16:50 UTCJul 8, 20:15 UTC3h 25m
2026-07-08 SWA3890 - Jul 8, 13:30 UTCJul 8, 15:10 UTC1h 40m
2026-07-08 SWA2323 - Jul 8, 05:30 UTCJul 8, 06:20 UTC50m
2026-07-08 SWA2626 - Jul 8, 01:40 UTCJul 8, 04:00 UTC2h 20m
2026-07-07 SWA562 - Jul 7, 23:20 UTCJul 8, 00:25 UTC1h 5m
2026-07-07 SWA3126 - Jul 7, 20:30 UTCJul 7, 22:05 UTC1h 35m
2026-07-07 SWA20 - Jul 7, 18:00 UTCJul 7, 19:20 UTC1h 20m
2026-07-07 SWA20 DAL → OMA Jul 7, 17:58 UTCJul 7, 19:20 UTC1h 22m
2026-07-07 SWA1250 - Jul 7, 14:10 UTCJul 7, 16:50 UTC2h 40m
2026-07-07 SWA4082 - Jul 7, 11:30 UTCJul 7, 12:05 UTC35m
2026-07-07 SWA4082 - Jul 7, 07:25 UTCJul 7, 07:40 UTC15m
2026-07-07 SWA3097 - Jul 7, 03:35 UTCJul 7, 03:55 UTC20m

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 N1807U page for operator, model, and routing details .

Mode-S A1440C frequently asked

What is Mode-S code A1440C?
A1440C is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N1807U.
Where is Mode-S A1440C registered?
Mode-S code A1440C 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 A1440C broadcasting right now?
No active broadcast right now. Last signal was 1h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A1440C, octal 50242014, decimal 10,568,716.
What flights does A1440C operate?
Mode-S A1440C has broadcast 20 distinct callsigns, including SWA3288, SWA4074, SWA3263, SWA468, SWA3246.