Apparatus

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sensors Mode-S transponder

A57B8B

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N452WN · BOEING 737-700 · operated by SOUTHWEST AIRLINES CO

Hex
A57B8B
Octal
51275613
Decimal
10,845,067
Country
US
Tail
N452WN
Type
B737
Broadcasting now · callsign SWA4065 · 29,000 ft
Flights observed
773
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:45 UTC

Current position

A57B8B is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A57B8B 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
SWA819 - 10 2026-07-16
SWA910 Southwest Airlines 7 2026-07-24
SWA3232 - 7 2026-07-15
SWA2379 Southwest Airlines 7 2026-07-24
SWA3391 Southwest Airlines 6 2026-06-03
SWA3214 Southwest Airlines 6 2026-04-16
SWA3171 Southwest Airlines 6 2026-06-02
SWA2433 - 6 2026-06-21
SWA2250 - 6 2026-07-15
SWA2137 Southwest Airlines 6 2026-05-09
SWA148 - 6 2026-06-22
SWA480 - 5 2026-06-23
SWA2421 Southwest Airlines 5 2026-07-23
SWA1227 - 5 2026-07-02
SWA973 Southwest Airlines 4 2026-07-23
SWA882 Southwest Airlines 4 2026-06-10
SWA698 Southwest Airlines 4 2026-05-24
SWA496 - 4 2026-06-30
SWA478 - 4 2026-06-28
SWA4659 Southwest Airlines 4 2026-06-03

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SWA1146 DAL → MKE Jul 26, 22:20 UTCJul 26, 22:45 UTC25m
2026-07-26 SWA179 MSY → DEN Jul 26, 18:25 UTCJul 26, 20:55 UTC2h 30m
2026-07-26 SWA1797 STL → LGA Jul 26, 14:40 UTCJul 26, 17:00 UTC2h 20m
2026-07-26 SWA1466 RNO → LAS Jul 26, 12:25 UTCJul 26, 13:30 UTC1h 5m
2026-07-26 SWA121 MCO → MSY Jul 26, 10:45 UTCJul 26, 11:30 UTC45m
2026-07-26 SWA540 LAS → SBA Jul 26, 01:10 UTCJul 26, 01:55 UTC45m
2026-07-25 SWA540 LAS → SBA Jul 25, 23:25 UTCJul 25, 23:55 UTC30m
2026-07-25 SWA410 MIA → MSY Jul 25, 21:35 UTCJul 25, 22:10 UTC35m
2026-07-25 SWA410 MIA → MSY Jul 25, 18:25 UTCJul 25, 20:10 UTC1h 45m
2026-07-25 SWA1333 SJC → DEN Jul 25, 15:35 UTCJul 25, 17:10 UTC1h 35m
2026-07-25 SWA1333 SJC → DEN Jul 25, 15:30 UTCJul 25, 17:04 UTC1h 34m
2026-07-25 SWA1249 ONT → SJC Jul 25, 12:55 UTCJul 25, 14:40 UTC1h 45m
2026-07-25 SWA792 MDW → SAV Jul 25, 09:30 UTCJul 25, 11:40 UTC2h 10m
2026-07-25 SWA792 MDW → SAV Jul 25, 09:27 UTCJul 25, 11:38 UTC2h 11m
2026-07-25 SWA4832 LBB → HOU Jul 25, 00:50 UTCJul 25, 03:00 UTC2h 10m
2026-07-24 SWA910 PHX → SAN Jul 24, 21:50 UTCJul 24, 23:20 UTC1h 30m
2026-07-24 SWA910 PHX → SAN Jul 24, 21:44 UTCJul 24, 23:17 UTC1h 33m
2026-07-24 SWA910 PHX → SAN Jul 24, 19:10 UTCJul 24, 20:45 UTC1h 35m
2026-07-24 SWA910 PHX → SAN Jul 24, 17:30 UTCJul 24, 18:10 UTC40m
2026-07-24 SWA2379 TPA → ALB Jul 24, 13:50 UTCJul 24, 16:25 UTC2h 35m
2026-07-24 SWA2379 TPA → ALB Jul 24, 13:45 UTCJul 24, 16:25 UTC2h 40m
2026-07-24 SWA3681 ATL → CMH Jul 24, 03:30 UTCJul 24, 04:20 UTC50m
2026-07-24 SWA3681 ATL → CMH Jul 24, 03:25 UTCJul 24, 04:16 UTC52m
2026-07-24 SWA3164 BWI → SAT Jul 24, 01:50 UTCJul 24, 02:40 UTC50m
2026-07-24 SWA3164 BWI → SAT Jul 24, 01:47 UTCJul 24, 02:35 UTC48m
2026-07-24 SWA3691 BOS → MDW Jul 24, 00:06 UTCJul 24, 01:00 UTC54m
2026-07-24 SWA3691 BOS → MDW Jul 24, 00:10 UTCJul 24, 01:05 UTC55m
2026-07-23 SWA3539 MDW → PIT Jul 23, 22:00 UTCJul 23, 22:55 UTC55m
2026-07-23 SWA4846 CMH → DEN Jul 23, 20:15 UTCJul 23, 21:05 UTC50m
2026-07-23 SWA2421 SJC → PHX Jul 23, 20:11 UTCJul 23, 22:54 UTC2h 43m
2026-07-23 SWA2421 SJC → PHX Jul 23, 18:25 UTCJul 23, 19:20 UTC55m
2026-07-23 SWA973 LAS → AUS Jul 23, 16:30 UTCJul 23, 17:10 UTC40m
2026-07-23 SWA973 LAS → AUS Jul 23, 10:40 UTCJul 23, 15:15 UTC4h 35m
2026-07-22 SWA27 MDW → LGA Jul 22, 23:25 UTCJul 23, 02:00 UTC2h 35m
2026-07-22 SWA27 MDW → LGA Jul 22, 23:24 UTCJul 23, 01:58 UTC2h 34m
2026-07-22 SWA109 PVR → HOU Jul 22, 20:50 UTCJul 22, 22:05 UTC1h 15m
2026-07-22 SWA1298 - Jul 22, 16:55 UTCJul 22, 17:35 UTC40m
2026-07-22 SWA1298 PHX → PVR Jul 22, 16:51 UTCJul 22, 18:56 UTC2h 5m
2026-07-22 SWA4256 LAS → PHX Jul 22, 13:55 UTCJul 22, 15:15 UTC1h 20m
2026-07-22 SWA4152 - Jul 22, 02:40 UTCJul 22, 04:35 UTC1h 55m
2026-07-22 SWA1845 PVD → MDW Jul 22, 01:00 UTCJul 22, 01:50 UTC50m
2026-07-21 SWA2235 LAX → SJC Jul 21, 23:00 UTCJul 21, 23:45 UTC45m
2026-07-21 SWA2235 LAX → SJC Jul 21, 18:40 UTCJul 21, 21:00 UTC2h 20m
2026-07-21 SWA748 PHX → RNO Jul 21, 16:40 UTCJul 21, 17:45 UTC1h 5m
2026-07-21 SWA4118 BNA → JAX Jul 21, 14:35 UTCJul 21, 15:10 UTC35m
2026-07-21 SWA9002 MDW → CVG Jul 21, 00:38 UTCJul 21, 01:28 UTC50m
2026-07-21 SWA9002 MDW → CVG Jul 21, 00:40 UTCJul 21, 01:25 UTC45m
2026-07-20 SWA515 PVR → DEN Jul 20, 14:55 UTCJul 20, 21:00 UTC6h 5m
2026-07-20 SWA4896 HOU → STL Jul 20, 12:20 UTCJul 20, 13:30 UTC1h 10m
2026-07-20 SWA3826 SJC → LAS Jul 20, 02:30 UTCJul 20, 03:40 UTC1h 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 N452WN page for operator, model, and routing details .

Mode-S A57B8B frequently asked

What is Mode-S code A57B8B?
A57B8B is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N452WN.
Where is Mode-S A57B8B registered?
Mode-S code A57B8B 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 A57B8B broadcasting right now?
Yes. Mode-S A57B8B is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A57B8B, octal 51275613, decimal 10,845,067.
What flights does A57B8B operate?
Mode-S A57B8B has broadcast 20 distinct callsigns, including SWA819, SWA910, SWA3232, SWA2379, SWA3391.