Apparatus

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sensors Mode-S transponder

A5C31B

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N470WN · BOEING 737-700 · operated by SOUTHWEST AIRLINES CO

Hex
A5C31B
Octal
51341433
Decimal
10,863,387
Country
US
Tail
N470WN
Type
B737
No current signal · last broadcast 1d ago
Flights observed
685
Distinct callsigns
20
Country
US
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S A5C31B.

Country allocation

The ICAO 24-bit address A5C31B 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
SWA3935 Southwest Airlines 8 2026-05-09
SWA1700 Southwest Airlines 6 2026-06-15
SWA1315 Southwest Airlines 6 2026-05-24
SWA397 - 5 2026-06-18
SWA3538 - 5 2026-06-19
SWA148 Southwest Airlines 5 2026-06-04
SWA684 - 4 2026-06-29
SWA352 - 4 2026-07-14
SWA3419 Southwest Airlines 4 2026-04-25
SWA2866 Southwest Airlines 4 2026-07-23
SWA262 - 4 2026-07-10
SWA25 - 4 2026-07-14
SWA23 Southwest Airlines 4 2026-05-17
SWA1433 Southwest Airlines 4 2026-06-21
SWA1300 - 4 2026-07-12
SWA1185 Southwest Airlines 4 2026-05-11
SWA868 - 3 2026-07-11
SWA8510 Southwest Airlines 3 2026-04-21
SWA582 - 3 2026-06-23
SWA4937 - 3 2026-07-10

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SWA1509 SJC → DAL Jul 26, 21:25 UTCJul 26, 22:45 UTC1h 20m
2026-07-26 SWA3495 MDW → CMH Jul 26, 18:35 UTCJul 26, 20:25 UTC1h 50m
2026-07-26 SWA5024 HOU → SAT Jul 26, 15:40 UTCJul 26, 17:30 UTC1h 50m
2026-07-26 SWA1901 ABQ → SAN Jul 26, 14:10 UTCJul 26, 14:30 UTC20m
2026-07-26 SWA409 MDW → STL Jul 26, 00:30 UTCJul 26, 00:45 UTC15m
2026-07-25 SWA4213 SAN → SJC Jul 25, 21:15 UTCJul 25, 23:05 UTC1h 50m
2026-07-25 SWA4213 SAN → SJC Jul 25, 21:14 UTCJul 25, 23:01 UTC1h 47m
2026-07-25 SWA1776 OAK → BUR Jul 25, 19:30 UTCJul 25, 20:15 UTC45m
2026-07-25 SWA3090 DAL → ATL Jul 25, 17:30 UTCJul 25, 18:10 UTC40m
2026-07-25 SWA2766 LAS → SFO Jul 25, 15:05 UTCJul 25, 16:05 UTC1h 0m
2026-07-25 SWA2680 MDW → DAL Jul 25, 10:25 UTCJul 25, 14:10 UTC3h 45m
2026-07-24 SWA1225 PHX → SJC Jul 24, 23:20 UTCJul 25, 04:00 UTC4h 40m
2026-07-24 SWA3124 OAK → PHX Jul 24, 20:55 UTCJul 24, 21:35 UTC40m
2026-07-24 SWA1529 DAL → DCA Jul 24, 18:45 UTCJul 24, 19:35 UTC50m
2026-07-24 SWA1529 DAL → DCA Jul 24, 18:43 UTCJul 24, 19:30 UTC47m
2026-07-24 SWA2327 LAS → OAK Jul 24, 14:25 UTCJul 24, 17:30 UTC3h 5m
2026-07-24 SWA2327 LAS → OAK Jul 24, 14:23 UTCJul 24, 17:27 UTC3h 4m
2026-07-24 SWA2327 LAS → OAK Jul 24, 12:25 UTCJul 24, 13:20 UTC55m
2026-07-24 SWA4916 GRR → MCO Jul 24, 00:55 UTCJul 24, 03:10 UTC2h 15m
2026-07-23 SWA2866 DEN → BUR Jul 23, 21:10 UTCJul 23, 23:50 UTC2h 40m
2026-07-23 SWA2866 DEN → BUR Jul 23, 21:09 UTCJul 23, 23:38 UTC2h 29m
2026-07-23 SWA2866 DEN → BUR Jul 23, 19:00 UTCJul 23, 19:55 UTC55m
2026-07-23 SWA2866 DEN → BUR Jul 23, 15:45 UTCJul 23, 17:40 UTC1h 55m
2026-07-23 SWA4103 PWM → BWI Jul 23, 13:00 UTCJul 23, 14:35 UTC1h 35m
2026-07-23 SWA2413 SAN → OAK Jul 23, 07:15 UTCJul 23, 10:50 UTC3h 35m
2026-07-23 SWA547 MDW → BDL Jul 23, 05:00 UTCJul 23, 05:55 UTC55m
2026-07-23 SWA311 BNA → DTW Jul 23, 03:10 UTCJul 23, 04:05 UTC55m
2026-07-22 SWA65 DAL → HOU Jul 22, 23:35 UTCJul 23, 02:10 UTC2h 35m
2026-07-22 SWA5065 BWI → ATL Jul 22, 21:05 UTCJul 22, 22:10 UTC1h 5m
2026-07-22 SWA5065 BWI → ATL Jul 22, 20:50 UTCJul 22, 22:04 UTC1h 14m
2026-07-22 SWA5064 MDW → DAL Jul 22, 18:35 UTCJul 22, 19:30 UTC55m
2026-07-22 SWA335 LAX → SJC Jul 22, 15:15 UTCJul 22, 17:20 UTC2h 5m
2026-07-22 SWA335 LAX → SJC Jul 22, 11:25 UTCJul 22, 14:00 UTC2h 35m
2026-07-21 SWA3832 TPA → BDL Jul 21, 23:40 UTCJul 22, 03:18 UTC3h 38m
2026-07-21 SWA3832 - Jul 21, 23:45 UTCJul 22, 03:05 UTC3h 20m
2026-07-21 SWA1872 BOS → BWI Jul 21, 19:40 UTCJul 21, 21:55 UTC2h 15m
2026-07-21 SWA1872 BOS → BWI Jul 21, 19:39 UTCJul 21, 21:48 UTC2h 9m
2026-07-21 SWA4252 STL → SFO Jul 21, 15:12 UTCJul 21, 18:15 UTC3h 4m
2026-07-21 SWA4252 STL → SFO Jul 21, 15:15 UTCJul 21, 18:15 UTC3h 0m
2026-07-21 SWA2444 MHT → MDW Jul 21, 12:15 UTCJul 21, 13:05 UTC50m
2026-07-21 SWA1574 - Jul 21, 03:45 UTCJul 21, 04:50 UTC1h 5m
2026-07-21 SWA1304 SFO → LAX Jul 21, 01:25 UTCJul 21, 02:50 UTC1h 25m
2026-07-20 SWA1316 - Jul 20, 23:20 UTCJul 21, 00:10 UTC49m
2026-07-20 SWA1316 DEN → SAT Jul 20, 20:45 UTCJul 20, 22:35 UTC1h 50m
2026-07-20 SWA4284 STL → MSY Jul 20, 17:15 UTCJul 20, 19:25 UTC2h 10m
2026-07-20 SWA2386 DEN → SFO Jul 20, 13:55 UTCJul 20, 15:55 UTC2h 0m
2026-07-20 SWA1220 LAX → OAK Jul 20, 11:47 UTCJul 20, 12:11 UTC25m
2026-07-20 SWA1220 LAX → OAK Jul 20, 11:50 UTCJul 20, 12:10 UTC20m
2026-07-20 SWA1265 DEN → COS Jul 20, 03:45 UTCJul 20, 04:05 UTC20m
2026-07-20 SWA1538 MHT → BWI Jul 20, 00:30 UTCJul 20, 02:30 UTC2h 0m

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 N470WN page for operator, model, and routing details .

Mode-S A5C31B frequently asked

What is Mode-S code A5C31B?
A5C31B is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N470WN.
Where is Mode-S A5C31B registered?
Mode-S code A5C31B 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 A5C31B broadcasting right now?
No active broadcast right now. Last signal was 1d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A5C31B, octal 51341433, decimal 10,863,387.
What flights does A5C31B operate?
Mode-S A5C31B has broadcast 20 distinct callsigns, including SWA3935, SWA1700, SWA1315, SWA397, SWA3538.