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sensors Mode-S transponder

AC0843

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N8745K · BOEING 737 MAX 8 · operated by UMB BANK NA TRUSTEE

Hex
AC0843
Octal
53004103
Decimal
11,274,307
Country
US
Tail
N8745K
Type
B38M
No current signal · last broadcast 2h ago
Flights observed
600
Distinct callsigns
20
Country
US
Last broadcast
2h ago

Last known position

Most recent position reported by Mode-S AC0843.

Country allocation

The ICAO 24-bit address AC0843 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
SWA808 Southwest Airlines 6 2026-05-29
SWA2525 Southwest Airlines 6 2026-06-05
SWA946 Southwest Airlines 5 2026-04-15
SWA510 - 5 2026-06-18
SWA2229 Southwest Airlines 5 2026-04-16
SWA2122 - 5 2026-06-30
SWA298 Southwest Airlines 4 2026-04-18
SWA2522 Southwest Airlines 4 2026-05-31
SWA2501 Southwest Airlines 4 2026-05-31
SWA2251 - 4 2026-06-22
SWA2176 Southwest Airlines 4 2026-06-05
SWA1995 - 4 2026-07-11
SWA1751 - 4 2026-07-11
SWA1475 Southwest Airlines 4 2026-05-23
SWA115 - 4 2026-07-11
SWA9001 Southwest Airlines 3 2026-05-13
SWA823 - 3 2026-06-15
SWA817 - 3 2026-07-07
SWA786 Southwest Airlines 3 2026-05-27
SWA779 Southwest Airlines 3 2026-04-17

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 SWA3099 - Jul 14, 00:00 UTCJul 14, 00:20 UTC20m
2026-07-13 SWA2138 - Jul 13, 16:35 UTCJul 13, 17:45 UTC1h 10m
2026-07-13 SWA672 - Jul 13, 10:35 UTCJul 13, 11:50 UTC1h 15m
2026-07-12 SWA373 SAN → OGG Jul 12, 17:35 UTCJul 12, 22:46 UTC5h 11m
2026-07-12 SWA373 - Jul 12, 17:35 UTCJul 12, 18:15 UTC40m
2026-07-12 SWA3824 - Jul 12, 13:20 UTCJul 12, 16:01 UTC2h 40m
2026-07-12 SWA3824 HOU → SAN Jul 12, 13:19 UTCJul 12, 15:56 UTC2h 37m
2026-07-12 SWA1628 - Jul 12, 11:20 UTCJul 12, 12:01 UTC40m
2026-07-12 SWA4195 - Jul 12, 03:01 UTCJul 12, 03:50 UTC50m
2026-07-11 SWA4260 - Jul 11, 23:05 UTCJul 12, 02:15 UTC3h 10m
2026-07-11 SWA115 - Jul 11, 19:25 UTCJul 11, 21:40 UTC2h 15m
2026-07-11 SWA115 CUN → SAT Jul 11, 19:24 UTCJul 11, 21:38 UTC2h 14m
2026-07-11 SWA1995 STL → CUN Jul 11, 15:04 UTCJul 11, 17:49 UTC2h 45m
2026-07-11 SWA1995 STL → CUN Jul 11, 15:05 UTCJul 11, 17:55 UTC2h 50m
2026-07-11 SWA1751 DEN → STL Jul 11, 11:49 UTCJul 11, 13:19 UTC1h 31m
2026-07-11 SWA1751 - Jul 11, 11:50 UTCJul 11, 12:45 UTC55m
2026-07-11 SWA3914 STL → DEN Jul 11, 04:50 UTCJul 11, 06:45 UTC1h 55m
2026-07-11 SWA4444 DAL → STL Jul 11, 02:10 UTCJul 11, 03:30 UTC1h 20m
2026-07-11 SWA4444 DAL → STL Jul 11, 02:10 UTCJul 11, 03:27 UTC1h 18m
2026-07-10 SWA4489 LAS → DAL Jul 10, 22:55 UTCJul 11, 01:10 UTC2h 15m
2026-07-10 SWA1562 DEN → LAS Jul 10, 20:05 UTCJul 10, 21:35 UTC1h 30m
2026-07-10 SWA4238 - Jul 10, 16:55 UTCJul 10, 18:45 UTC1h 50m
2026-07-10 SWA2019 - Jul 10, 13:05 UTCJul 10, 15:50 UTC2h 45m
2026-07-10 SWA2019 HOU → LGB Jul 10, 13:00 UTCJul 10, 15:47 UTC2h 47m
2026-07-10 SWA4430 - Jul 10, 10:10 UTCJul 10, 11:35 UTC1h 25m
2026-07-10 SWA4091 - Jul 10, 02:55 UTCJul 10, 04:10 UTC1h 15m
2026-07-09 SWA217 CUN → MDW Jul 9, 21:25 UTCJul 10, 00:40 UTC3h 15m
2026-07-09 SWA386 BNA → CUN Jul 9, 17:30 UTCJul 9, 19:45 UTC2h 15m
2026-07-09 SWA386 BNA → CUN Jul 9, 17:26 UTCJul 9, 19:48 UTC2h 22m
2026-07-09 SWA4649 LAS → OAK Jul 9, 14:45 UTCJul 9, 15:55 UTC1h 10m
2026-07-09 SWA4941 - Jul 9, 12:10 UTCJul 9, 13:40 UTC1h 30m
2026-07-09 SWA775 - Jul 9, 02:45 UTCJul 9, 04:45 UTC2h 0m
2026-07-09 SWA775 MDW → AUS Jul 9, 02:42 UTCJul 9, 04:41 UTC1h 59m
2026-07-08 SWA4120 RSW → MDW Jul 8, 22:50 UTCJul 9, 01:15 UTC2h 25m
2026-07-08 SWA4334 DEN → RSW Jul 8, 18:15 UTCJul 8, 21:35 UTC3h 20m
2026-07-08 SWA1972 - Jul 8, 14:50 UTCJul 8, 16:45 UTC1h 55m
2026-07-08 SWA3246 - Jul 8, 10:40 UTCJul 8, 13:25 UTC2h 45m
2026-07-08 SWA1961 - Jul 8, 03:00 UTCJul 8, 05:35 UTC2h 35m
2026-07-08 SWA1961 HOU → BWI Jul 8, 02:58 UTCJul 8, 05:36 UTC2h 38m
2026-07-07 SWA817 - Jul 7, 23:00 UTCJul 7, 23:25 UTC25m
2026-07-07 SWA817 - Jul 7, 21:10 UTCJul 7, 22:05 UTC55m
2026-07-07 SWA817 LIR → HOU Jul 7, 20:24 UTCJul 7, 23:24 UTC3h 0m
2026-07-07 SWA691 - Jul 7, 16:05 UTCJul 7, 18:15 UTC2h 10m
2026-07-07 SWA691 HOU → LIR Jul 7, 16:03 UTCJul 7, 18:59 UTC2h 56m
2026-07-07 SWA534 - Jul 7, 01:45 UTCJul 7, 03:35 UTC1h 50m
2026-07-06 SWA2112 LAS → BNA Jul 6, 21:05 UTCJul 7, 00:15 UTC3h 10m
2026-07-06 SWA2112 LAS → BNA Jul 6, 21:01 UTCJul 7, 00:13 UTC3h 12m
2026-07-06 SWA2328 PHX → LAS Jul 6, 18:50 UTCJul 6, 19:30 UTC40m
2026-07-06 SWA2419 - Jul 6, 16:50 UTCJul 6, 17:50 UTC1h 0m
2026-07-06 SWA2419 - Jul 6, 14:55 UTCJul 6, 15:55 UTC1h 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 N8745K page for operator, model, and routing details .

Mode-S AC0843 frequently asked

What is Mode-S code AC0843?
AC0843 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N8745K.
Where is Mode-S AC0843 registered?
Mode-S code AC0843 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 AC0843 broadcasting right now?
No active broadcast right now. Last signal was 2h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AC0843, octal 53004103, decimal 11,274,307.
What flights does AC0843 operate?
Mode-S AC0843 has broadcast 20 distinct callsigns, including SWA808, SWA2525, SWA946, SWA510, SWA2229.