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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 Jul 26, 23:00 UTC
Flights observed
640
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 23:00 UTC

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
SWA2251 - 5 2026-07-22
SWA468 - 4 2026-06-26
SWA4445 Southwest Airlines 4 2026-07-22
SWA4420 - 4 2026-07-17
SWA3246 - 4 2026-06-26
SWA305 - 4 2026-07-13
SWA2848 Southwest Airlines 4 2026-06-02
SWA2691 Southwest Airlines 4 2026-06-03
SWA2408 Southwest Airlines 4 2026-07-19
SWA2261 Southwest Airlines 4 2026-06-03
SWA1661 - 4 2026-04-13
SWA1086 Southwest Airlines 4 2026-05-09
SWA751 - 3 2026-07-19
SWA691 - 3 2026-07-02
SWA4360 Southwest Airlines 3 2026-07-21
SWA4203 - 3 2026-07-04
SWA3977 - 3 2026-04-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SWA308 CUN → HOU Jul 26, 22:25 UTCJul 26, 23:00 UTC35m
2026-07-26 SWA1613 BWI → CUN Jul 26, 18:00 UTCJul 26, 20:55 UTC2h 55m
2026-07-26 SWA1613 BWI → CUN Jul 26, 17:56 UTCJul 26, 21:00 UTC3h 4m
2026-07-26 SWA1067 PBI → ISP Jul 26, 14:25 UTCJul 26, 16:25 UTC2h 0m
2026-07-26 SWA1082 ALB → MDW Jul 26, 10:45 UTCJul 26, 12:45 UTC2h 0m
2026-07-26 SWA1082 ALB → MDW Jul 26, 10:45 UTCJul 26, 12:48 UTC2h 3m
2026-07-25 SWA2466 SJC → ONT Jul 25, 23:40 UTCJul 26, 01:40 UTC2h 0m
2026-07-25 SWA2466 SJC → ONT Jul 25, 23:35 UTCJul 26, 01:34 UTC1h 59m
2026-07-25 SWA4407 FLL → MDW Jul 25, 22:00 UTCJul 25, 22:55 UTC55m
2026-07-25 SWA4407 FLL → MDW Jul 25, 21:55 UTCJul 25, 22:52 UTC57m
2026-07-25 SWA217 CUN → MDW Jul 25, 16:35 UTCJul 25, 19:40 UTC3h 5m
2026-07-25 SWA217 CUN → MDW Jul 25, 16:31 UTCJul 25, 19:34 UTC3h 4m
2026-07-25 SWA612 CMH → CUN Jul 25, 11:30 UTCJul 25, 14:25 UTC2h 55m
2026-07-25 SWA612 CMH → CUN Jul 25, 11:26 UTCJul 25, 14:25 UTC2h 59m
2026-07-25 SWA4812 STL → ATL Jul 25, 01:45 UTCJul 25, 02:45 UTC1h 0m
2026-07-24 SWA4801 PHL → FLL Jul 24, 20:50 UTCJul 24, 23:25 UTC2h 35m
2026-07-24 SWA4801 PHL → FLL Jul 24, 20:46 UTCJul 24, 23:20 UTC2h 34m
2026-07-24 SWA4586 SAN → SJC Jul 24, 18:55 UTCJul 24, 19:40 UTC45m
2026-07-24 SWA4543 LAS → TUS Jul 24, 16:50 UTCJul 24, 17:35 UTC45m
2026-07-24 SWA4673 SJC → SEA Jul 24, 12:35 UTCJul 24, 15:20 UTC2h 45m
2026-07-24 SWA1756 PHX → ELP Jul 24, 02:20 UTCJul 24, 03:55 UTC1h 35m
2026-07-24 SWA1756 PHX → ELP Jul 24, 02:16 UTCJul 24, 03:48 UTC1h 32m
2026-07-23 SWA2632 ONT → DEN Jul 23, 21:30 UTCJul 24, 01:10 UTC3h 40m
2026-07-23 SWA2919 MSY → DAL Jul 23, 17:30 UTCJul 23, 20:15 UTC2h 45m
2026-07-23 SWA4761 DEN → LGA Jul 23, 13:20 UTCJul 23, 16:15 UTC2h 55m
2026-07-23 SWA4646 - Jul 23, 09:40 UTCJul 23, 11:50 UTC2h 10m
2026-07-23 SWA4840 DAL → HRL Jul 23, 01:05 UTCJul 23, 03:15 UTC2h 10m
2026-07-22 SWA3501 MSY → HOU Jul 22, 21:40 UTCJul 22, 23:50 UTC2h 10m
2026-07-22 SWA3035 BUF → DEN Jul 22, 17:00 UTCJul 22, 19:40 UTC2h 40m
2026-07-22 SWA3035 BUF → DEN Jul 22, 16:58 UTCJul 22, 19:37 UTC2h 40m
2026-07-22 SWA4445 BNA → PIT Jul 22, 15:20 UTCJul 22, 15:55 UTC35m
2026-07-22 SWA4445 BNA → PIT Jul 22, 15:19 UTCJul 22, 15:52 UTC33m
2026-07-22 SWA2251 - Jul 22, 11:35 UTCJul 22, 14:05 UTC2h 30m
2026-07-22 SWA2251 HOU → LAS Jul 22, 11:29 UTCJul 22, 13:59 UTC2h 30m
2026-07-22 SWA2026 BWI → FLL Jul 22, 03:05 UTCJul 22, 05:00 UTC1h 55m
2026-07-21 SWA2120 LAX → SFO Jul 21, 22:05 UTCJul 22, 01:20 UTC3h 15m
2026-07-21 SWA4511 OAK → LAS Jul 21, 16:22 UTCJul 21, 20:46 UTC4h 24m
2026-07-21 SWA4511 OAK → LAS Jul 21, 16:25 UTCJul 21, 19:00 UTC2h 35m
2026-07-21 SWA4119 - Jul 21, 14:20 UTCJul 21, 15:05 UTC45m
2026-07-21 SWA4360 SAT → HOU Jul 21, 04:50 UTCJul 21, 07:30 UTC2h 40m
2026-07-21 SWA3472 - Jul 21, 01:20 UTCJul 21, 03:30 UTC2h 10m
2026-07-20 SWA4764 HOU → SAN Jul 20, 21:50 UTCJul 21, 00:05 UTC2h 14m
2026-07-20 SWA4542 TPA → IND Jul 20, 16:00 UTCJul 20, 19:35 UTC3h 35m
2026-07-20 SWA4542 TPA → IND Jul 20, 15:58 UTCJul 20, 19:34 UTC3h 36m
2026-07-20 SWA4933 HOU → SAN Jul 20, 13:40 UTCJul 20, 14:35 UTC55m
2026-07-20 SWA1728 - Jul 20, 06:45 UTCJul 20, 08:45 UTC2h 0m
2026-07-20 SWA4639 TPA → AUS Jul 20, 03:00 UTCJul 20, 05:05 UTC2h 5m
2026-07-19 SWA2940 - Jul 19, 21:05 UTCJul 19, 23:45 UTC2h 40m
2026-07-19 SWA2940 BWI → HOU Jul 19, 21:03 UTCJul 19, 23:45 UTC2h 42m
2026-07-19 SWA1608 CUN → BWI Jul 19, 15:25 UTCJul 19, 18:35 UTC3h 10m

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 Jul 26, 23:00 UTC.
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, SWA2251, SWA468.