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sensors Mode-S transponder

AC5B43

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N8957Q · operated by SOUTHWEST AIRLINES CO

Hex
AC5B43
Octal
53055503
Decimal
11,295,555
Country
US
Tail
N8957Q
Type
B38M
Broadcasting now · callsign SWA3190 · 37,000 ft
Flights observed
689
Distinct callsigns
20
Country
US
Last broadcast
25m ago

Current position

AC5B43 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address AC5B43 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
SWA485 - 5 2026-06-28
SWA2391 Southwest Airlines 5 2026-05-14
SWA879 - 4 2026-07-11
SWA714 Southwest Airlines 4 2026-05-22
SWA642 - 4 2026-07-12
SWA4920 Southwest Airlines 4 2026-06-09
SWA29 Southwest Airlines 4 2026-05-18
SWA2684 - 4 2026-04-14
SWA2575 Southwest Airlines 4 2026-04-16
SWA1644 Southwest Airlines 4 2026-05-17
SWA1370 - 4 2026-06-24
SWA1277 - 4 2026-06-22
SWA998 Southwest Airlines 3 2026-04-22
SWA937 - 3 2026-06-19
SWA4470 Southwest Airlines 3 2026-06-11
SWA440 - 3 2026-06-26
SWA4160 - 3 2026-06-19
SWA3937 - 3 2026-07-03
SWA3878 Southwest Airlines 3 2026-04-18
SWA378 - 3 2026-04-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-15 SWA3190 - Jul 15, 01:30 UTCJul 15, 02:45 UTC1h 15m
2026-07-14 SWA3190 SEA → PHX Jul 14, 21:30 UTCJul 15, 00:10 UTC2h 39m
2026-07-14 SWA3190 BWI → SEA Jul 14, 14:55 UTCJul 14, 19:35 UTC4h 40m
2026-07-14 SWA1956 MCO → BWI Jul 14, 11:05 UTCJul 14, 12:55 UTC1h 50m
2026-07-14 SWA2821 - Jul 14, 02:10 UTCJul 14, 04:15 UTC2h 5m
2026-07-14 SWA2821 MDW → MCO Jul 14, 02:06 UTCJul 14, 04:17 UTC2h 11m
2026-07-13 SWA1447 DCA → MDW Jul 13, 23:30 UTCJul 14, 01:00 UTC1h 30m
2026-07-13 SWA1447 DCA → MDW Jul 13, 23:28 UTCJul 14, 00:56 UTC1h 28m
2026-07-13 SWA3515 - Jul 13, 21:15 UTCJul 13, 22:20 UTC1h 5m
2026-07-13 SWA856 MDW → PVD Jul 13, 18:15 UTCJul 13, 20:05 UTC1h 50m
2026-07-13 SWA2571 - Jul 13, 16:05 UTCJul 13, 17:15 UTC1h 10m
2026-07-13 SWA1343 - Jul 13, 13:55 UTCJul 13, 15:00 UTC1h 5m
2026-07-13 SWA4458 - Jul 13, 11:50 UTCJul 13, 13:10 UTC1h 20m
2026-07-13 SWA4458 ELP → DAL Jul 13, 11:40 UTCJul 13, 13:04 UTC1h 24m
2026-07-13 SWA1137 - Jul 13, 05:50 UTCJul 13, 06:55 UTC1h 5m
2026-07-12 SWA3415 - Jul 12, 23:40 UTCJul 13, 04:30 UTC4h 50m
2026-07-12 SWA1887 GEG → SAN Jul 12, 19:55 UTCJul 12, 22:25 UTC2h 30m
2026-07-12 SWA1887 GEG → SAN Jul 12, 19:53 UTCJul 12, 22:24 UTC2h 32m
2026-07-12 SWA2306 LAS → GEG Jul 12, 17:05 UTCJul 12, 18:50 UTC1h 45m
2026-07-12 SWA4306 SEA → LAS Jul 12, 13:40 UTCJul 12, 15:55 UTC2h 15m
2026-07-12 SWA4306 SEA → LAS Jul 12, 13:40 UTCJul 12, 15:47 UTC2h 7m
2026-07-12 SWA286 PHX → SEA Jul 12, 05:50 UTCJul 12, 08:05 UTC2h 15m
2026-07-12 SWA286 PHX → SEA Jul 12, 05:48 UTCJul 12, 08:07 UTC2h 19m
2026-07-12 SWA642 - Jul 12, 01:25 UTCJul 12, 04:30 UTC3h 5m
2026-07-11 SWA879 - Jul 11, 22:25 UTCJul 12, 00:01 UTC1h 35m
2026-07-11 SWA879 BWI → BNA Jul 11, 22:23 UTCJul 12, 00:16 UTC1h 53m
2026-07-11 SWA907 MBJ → BWI Jul 11, 17:16 UTCJul 11, 20:13 UTC2h 58m
2026-07-11 SWA292 - Jul 11, 14:15 UTCJul 11, 18:45 UTC4h 30m
2026-07-11 SWA4580 DCA → MCO Jul 11, 10:20 UTCJul 11, 12:05 UTC1h 45m
2026-07-11 SWA4580 DCA → MCO Jul 11, 10:18 UTCJul 11, 11:57 UTC1h 40m
2026-07-11 SWA3908 STL → DCA Jul 11, 02:35 UTCJul 11, 04:15 UTC1h 40m
2026-07-10 SWA2400 - Jul 10, 21:00 UTCJul 11, 00:15 UTC3h 15m
2026-07-10 SWA4602 PHX → LAX Jul 10, 18:35 UTCJul 10, 19:35 UTC1h 0m
2026-07-10 SWA3815 SMF → PHX Jul 10, 15:10 UTCJul 10, 16:35 UTC1h 25m
2026-07-10 SWA8800 DAL → SMF Jul 10, 11:10 UTCJul 10, 14:15 UTC3h 5m
2026-07-10 SWA3736 SLC → DAL Jul 10, 01:57 UTCJul 10, 04:06 UTC2h 9m
2026-07-10 SWA3736 - Jul 10, 02:00 UTCJul 10, 04:10 UTC2h 10m
2026-07-09 SWA1733 - Jul 9, 23:35 UTCJul 10, 00:55 UTC1h 20m
2026-07-09 SWA1733 DEN → SLC Jul 9, 23:33 UTCJul 10, 00:54 UTC1h 22m
2026-07-09 SWA2227 LAS → DEN Jul 9, 20:30 UTCJul 9, 22:25 UTC1h 55m
2026-07-09 SWA1809 TPA → LAS Jul 9, 15:00 UTCJul 9, 19:05 UTC4h 5m
2026-07-09 SWA2996 - Jul 9, 11:45 UTCJul 9, 13:45 UTC2h 0m
2026-07-09 SWA2996 CMH → TPA Jul 9, 11:44 UTCJul 9, 13:40 UTC1h 56m
2026-07-09 SWA1707 DEN → CMH Jul 9, 05:05 UTCJul 9, 07:40 UTC2h 35m
2026-07-09 SWA2720 ATL → LGA Jul 9, 00:20 UTCJul 9, 02:30 UTC2h 10m
2026-07-08 SWA2720 ATL → LGA Jul 8, 21:30 UTCJul 8, 22:55 UTC1h 25m
2026-07-08 SWA1444 - Jul 8, 16:15 UTCJul 8, 20:10 UTC3h 55m
2026-07-08 SWA1444 DCA → MDW Jul 8, 13:40 UTCJul 8, 15:05 UTC1h 25m
2026-07-08 SWA4976 - Jul 8, 10:55 UTCJul 8, 12:15 UTC1h 20m
2026-07-08 SWA361 - Jul 8, 02:30 UTCJul 8, 04:40 UTC2h 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 N8957Q page for operator, model, and routing details .

Mode-S AC5B43 frequently asked

What is Mode-S code AC5B43?
AC5B43 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N8957Q.
Where is Mode-S AC5B43 registered?
Mode-S code AC5B43 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 AC5B43 broadcasting right now?
Yes. Mode-S AC5B43 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AC5B43, octal 53055503, decimal 11,295,555.
What flights does AC5B43 operate?
Mode-S AC5B43 has broadcast 20 distinct callsigns, including SWA485, SWA2391, SWA879, SWA714, SWA642.