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sensors Mode-S transponder

A19404

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N200WN · BOEING 737-700 · operated by SOUTHWEST AIRLINES CO

Hex
A19404
Octal
50312004
Decimal
10,589,188
Country
US
Tail
N200WN
Type
B737
No current signal · last broadcast 4h ago
Flights observed
699
Distinct callsigns
20
Country
US
Last broadcast
4h ago

Last known position

Most recent position reported by Mode-S A19404.

Country allocation

The ICAO 24-bit address A19404 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
SWA3078 Southwest Airlines 8 2026-06-02
SWA169 Southwest Airlines 6 2026-04-13
SWA490 - 5 2026-07-08
SWA1095 Southwest Airlines 5 2026-05-06
SWA743 - 4 2026-07-09
SWA550 - 4 2026-06-23
SWA4977 Southwest Airlines 4 2026-07-04
SWA4551 Southwest Airlines 4 2026-05-16
SWA3871 - 4 2026-07-13
SWA3472 Southwest Airlines 4 2026-05-25
SWA3329 Southwest Airlines 4 2026-06-11
SWA3269 Southwest Airlines 4 2026-06-06
SWA267 Southwest Airlines 4 2026-05-29
SWA2644 Southwest Airlines 4 2026-04-16
SWA247 - 4 2026-06-22
SWA235 Southwest Airlines 4 2026-06-14
SWA2329 Southwest Airlines 4 2026-05-14
SWA1842 Southwest Airlines 4 2026-06-05
SWA1375 Southwest Airlines 4 2026-05-11
SWA1372 Southwest Airlines 4 2026-04-28

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-15 SWA3670 SMF → PHX Jul 15, 01:15 UTCJul 15, 02:45 UTC1h 30m
2026-07-14 SWA928 - Jul 14, 23:25 UTCJul 15, 00:20 UTC55m
2026-07-14 SWA928 LAX → SMF Jul 14, 23:22 UTCJul 15, 00:18 UTC56m
2026-07-14 SWA779 - Jul 14, 20:40 UTCJul 14, 22:10 UTC1h 30m
2026-07-14 SWA779 ABQ → LAX Jul 14, 20:36 UTCJul 14, 22:04 UTC1h 28m
2026-07-14 SWA4040 - Jul 14, 18:45 UTCJul 14, 19:35 UTC50m
2026-07-14 SWA3521 - Jul 14, 15:25 UTCJul 14, 16:25 UTC1h 0m
2026-07-14 SWA3521 LAX → PHX Jul 14, 15:25 UTCJul 14, 16:24 UTC59m
2026-07-14 SWA3521 - Jul 14, 13:15 UTCJul 14, 14:25 UTC1h 10m
2026-07-14 SWA2362 LAS → SMF Jul 14, 04:21 UTCJul 14, 05:20 UTC59m
2026-07-14 SWA2362 LAS → SMF Jul 14, 04:20 UTCJul 14, 05:20 UTC1h 0m
2026-07-14 SWA3786 SMF → LAS Jul 14, 02:00 UTCJul 14, 03:10 UTC1h 10m
2026-07-13 SWA3871 - Jul 13, 23:45 UTCJul 14, 00:55 UTC1h 10m
2026-07-13 SWA3871 SNA → SMF Jul 13, 23:43 UTCJul 14, 00:47 UTC1h 4m
2026-07-13 SWA3087 - Jul 13, 21:05 UTCJul 13, 22:20 UTC1h 15m
2026-07-13 SWA4893 - Jul 13, 19:05 UTCJul 13, 19:50 UTC45m
2026-07-13 SWA4893 LAX → OAK Jul 13, 19:03 UTCJul 13, 19:51 UTC48m
2026-07-13 SWA1569 - Jul 13, 15:50 UTCJul 13, 17:45 UTC1h 55m
2026-07-13 SWA1569 DEN → LAX Jul 13, 15:50 UTCJul 13, 17:39 UTC1h 49m
2026-07-13 SWA3615 SEA → DEN Jul 13, 12:25 UTCJul 13, 14:35 UTC2h 10m
2026-07-13 SWA1838 - Jul 13, 03:10 UTCJul 13, 07:01 UTC3h 50m
2026-07-13 SWA9002 - Jul 13, 00:15 UTCJul 13, 01:50 UTC1h 35m
2026-07-12 SWA3033 - Jul 12, 22:15 UTCJul 12, 23:00 UTC45m
2026-07-12 SWA3033 PIT → BWI Jul 12, 22:14 UTCJul 12, 22:59 UTC45m
2026-07-12 SWA3033 - Jul 12, 20:15 UTCJul 12, 21:05 UTC50m
2026-07-12 SWA3357 RDU → MDW Jul 12, 17:35 UTCJul 12, 19:10 UTC1h 35m
2026-07-12 SWA3357 RDU → MDW Jul 12, 17:35 UTCJul 12, 19:07 UTC1h 33m
2026-07-12 SWA1795 - Jul 12, 15:35 UTCJul 12, 17:01 UTC1h 25m
2026-07-12 SWA4062 - Jul 12, 12:40 UTCJul 12, 13:40 UTC1h 0m
2026-07-12 SWA2982 - Jul 12, 00:55 UTCJul 12, 01:50 UTC55m
2026-07-12 SWA2982 BNA → VPS Jul 12, 00:54 UTCJul 12, 01:51 UTC57m
2026-07-11 SWA3237 - Jul 11, 20:15 UTCJul 11, 23:30 UTC3h 15m
2026-07-11 SWA3237 - Jul 11, 17:50 UTCJul 11, 19:20 UTC1h 30m
2026-07-11 SWA860 LAS → SMF Jul 11, 15:40 UTCJul 11, 16:45 UTC1h 5m
2026-07-11 SWA860 - Jul 11, 11:15 UTCJul 11, 14:30 UTC3h 15m
2026-07-11 SWA1015 - Jul 11, 04:01 UTCJul 11, 05:45 UTC1h 45m
2026-07-11 SWA1118 - Jul 11, 00:05 UTCJul 11, 02:20 UTC2h 15m
2026-07-10 SWA569 - Jul 10, 20:35 UTCJul 10, 22:05 UTC1h 30m
2026-07-10 SWA1275 - Jul 10, 18:00 UTCJul 10, 19:25 UTC1h 25m
2026-07-10 SWA1275 DAL → BNA Jul 10, 17:57 UTCJul 10, 19:19 UTC1h 22m
2026-07-10 SWA4318 - Jul 10, 15:45 UTCJul 10, 17:10 UTC1h 25m
2026-07-10 SWA4318 OMA → DAL Jul 10, 15:42 UTCJul 10, 17:07 UTC1h 25m
2026-07-10 SWA4318 STL → OMA Jul 10, 13:35 UTCJul 10, 14:30 UTC55m
2026-07-10 SWA1165 - Jul 10, 10:30 UTCJul 10, 11:45 UTC1h 15m
2026-07-10 SWA4153 - Jul 10, 00:55 UTCJul 10, 01:45 UTC50m
2026-07-09 SWA2029 - Jul 9, 23:10 UTCJul 10, 00:10 UTC1h 0m
2026-07-09 SWA743 BOS → MCI Jul 9, 18:59 UTCJul 9, 21:57 UTC2h 58m
2026-07-09 SWA743 - Jul 9, 19:00 UTCJul 9, 21:55 UTC2h 55m
2026-07-09 SWA4560 PHX → SJC Jul 9, 15:35 UTCJul 9, 17:40 UTC2h 5m
2026-07-09 SWA2913 - Jul 9, 13:50 UTCJul 9, 14:25 UTC35m

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 N200WN page for operator, model, and routing details .

Mode-S A19404 frequently asked

What is Mode-S code A19404?
A19404 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N200WN.
Where is Mode-S A19404 registered?
Mode-S code A19404 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 A19404 broadcasting right now?
No active broadcast right now. Last signal was 4h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A19404, octal 50312004, decimal 10,589,188.
What flights does A19404 operate?
Mode-S A19404 has broadcast 20 distinct callsigns, including SWA3078, SWA169, SWA490, SWA1095, SWA743.