Apparatus

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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 Jul 26, 21:20 UTC
Flights observed
675
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:20 UTC

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
SWA2122 - 7 2026-07-19
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
SWA2397 Southwest Airlines 5 2026-07-23
SWA2229 Southwest Airlines 5 2026-04-16
SWA2171 - 5 2026-07-14
SWA4994 Southwest Airlines 4 2026-07-19
SWA4119 - 4 2026-07-17
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

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SWA1865 AUS → MIA Jul 26, 15:55 UTCJul 26, 21:20 UTC5h 25m
2026-07-26 SWA4331 CMH → FLL Jul 26, 11:50 UTCJul 26, 13:45 UTC1h 55m
2026-07-26 SWA900 BWI → MHT Jul 26, 03:10 UTCJul 26, 05:00 UTC1h 50m
2026-07-26 SWA295 SJC → LAS Jul 26, 00:50 UTCJul 26, 01:55 UTC1h 5m
2026-07-25 SWA3547 OAK → BUR Jul 25, 21:55 UTCJul 25, 23:05 UTC1h 10m
2026-07-25 SWA3547 OAK → BUR Jul 25, 21:53 UTCJul 25, 23:00 UTC1h 7m
2026-07-25 SWA914 LAS → SJC Jul 25, 19:55 UTCJul 25, 20:40 UTC45m
2026-07-25 SWA2333 - Jul 25, 17:15 UTCJul 25, 17:55 UTC40m
2026-07-25 SWA957 OAK → PDX Jul 25, 15:25 UTCJul 25, 16:15 UTC50m
2026-07-25 SWA2277 BLI → OAK Jul 25, 07:15 UTCJul 25, 12:45 UTC5h 30m
2026-07-24 SWA2240 LAX → MDW Jul 24, 17:55 UTCJul 24, 18:50 UTC55m
2026-07-24 SWA2240 LAX → MDW Jul 24, 17:50 UTCJul 24, 23:40 UTC5h 50m
2026-07-24 SWA4348 SRQ → ATL Jul 24, 14:50 UTCJul 24, 15:55 UTC1h 5m
2026-07-24 SWA1928 SNA → SJC Jul 24, 08:05 UTCJul 24, 12:30 UTC4h 25m
2026-07-23 SWA2397 LAX → MCI Jul 23, 16:10 UTCJul 23, 21:40 UTC5h 30m
2026-07-23 SWA2397 LAX → MCI Jul 23, 16:09 UTCJul 23, 21:37 UTC5h 28m
2026-07-23 SWA4637 AUS → LAS Jul 23, 10:30 UTCJul 23, 14:15 UTC3h 45m
2026-07-23 SWA3957 DEN → BNA Jul 23, 02:55 UTCJul 23, 03:35 UTC40m
2026-07-22 SWA4895 SRQ → IND Jul 22, 22:40 UTCJul 23, 00:55 UTC2h 15m
2026-07-22 SWA4895 SRQ → IND Jul 22, 22:39 UTCJul 23, 00:49 UTC2h 10m
2026-07-22 SWA4478 MDW → CLT Jul 22, 18:20 UTCJul 22, 21:15 UTC2h 55m
2026-07-22 SWA1267 - Jul 22, 15:00 UTCJul 22, 16:35 UTC1h 35m
2026-07-22 SWA1267 - Jul 22, 13:05 UTCJul 22, 13:50 UTC45m
2026-07-22 SWA2133 OAK → LAS Jul 22, 11:10 UTCJul 22, 11:40 UTC30m
2026-07-22 SWA2623 PHX → HOU Jul 22, 02:15 UTCJul 22, 04:15 UTC2h 0m
2026-07-21 SWA3844 LAS → TPA Jul 21, 21:15 UTCJul 22, 01:20 UTC4h 5m
2026-07-21 SWA3727 LAX → SFO Jul 21, 11:05 UTCJul 21, 14:45 UTC3h 40m
2026-07-21 SWA4755 - Jul 21, 02:50 UTCJul 21, 04:40 UTC1h 50m
2026-07-21 SWA686 - Jul 21, 00:40 UTCJul 21, 02:05 UTC1h 25m
2026-07-20 SWA3237 SJC → SNA Jul 20, 20:15 UTCJul 20, 23:25 UTC3h 10m
2026-07-20 SWA4766 - Jul 20, 17:30 UTCJul 20, 19:05 UTC1h 35m
2026-07-20 SWA3848 - Jul 20, 15:15 UTCJul 20, 16:15 UTC1h 0m
2026-07-20 SWA3848 SNA → OAK Jul 20, 15:15 UTCJul 20, 16:11 UTC56m
2026-07-20 SWA447 - Jul 20, 02:55 UTCJul 20, 03:55 UTC1h 0m
2026-07-19 SWA4994 MSY → TPA Jul 19, 21:15 UTCJul 19, 21:35 UTC20m
2026-07-19 SWA4994 MSY → TPA Jul 19, 21:13 UTCJul 20, 01:49 UTC4h 36m
2026-07-19 SWA2122 - Jul 19, 19:30 UTCJul 19, 19:50 UTC20m
2026-07-19 SWA2122 - Jul 19, 14:30 UTCJul 19, 15:10 UTC40m
2026-07-19 SWA2435 PHX → SMF Jul 19, 04:20 UTCJul 19, 05:05 UTC45m
2026-07-19 SWA4857 - Jul 19, 00:10 UTCJul 19, 03:10 UTC3h 0m
2026-07-18 SWA1203 - Jul 18, 18:40 UTCJul 18, 21:50 UTC3h 10m
2026-07-18 SWA602 BWI → SJO Jul 18, 13:00 UTCJul 18, 17:16 UTC4h 16m
2026-07-18 SWA1069 LAS → BWI Jul 18, 05:30 UTCJul 18, 09:45 UTC4h 15m
2026-07-18 SWA1069 LAS → BWI Jul 18, 05:31 UTCJul 18, 09:49 UTC4h 19m
2026-07-18 SWA4753 - Jul 18, 00:25 UTCJul 18, 03:35 UTC3h 11m
2026-07-18 SWA4753 IND → LAS Jul 18, 00:19 UTCJul 18, 03:31 UTC3h 12m
2026-07-17 SWA2837 DEN → IND Jul 17, 21:10 UTCJul 17, 23:10 UTC2h 0m
2026-07-17 SWA681 PHX → DEN Jul 17, 18:34 UTCJul 17, 20:00 UTC1h 25m
2026-07-17 SWA681 - Jul 17, 16:29 UTCJul 17, 17:20 UTC50m
2026-07-17 SWA4119 - Jul 17, 14:10 UTCJul 17, 14:44 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 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 Jul 26, 21:20 UTC.
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 SWA2122, SWA808, SWA2525, SWA946, SWA510.