Apparatus

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sensors Mode-S transponder

AC0143

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N8728Q · BOEING 737 MAX 8 · operated by UMB BANK NA TRUSTEE

Hex
AC0143
Octal
53000503
Decimal
11,272,515
Country
US
Tail
N8728Q
Type
B38M
No current signal · last broadcast Jul 26, 22:45 UTC
Flights observed
597
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:45 UTC

Last known position

Most recent position reported by Mode-S AC0143.

Country allocation

The ICAO 24-bit address AC0143 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
SWA2848 Southwest Airlines 6 2026-05-04
SWA169 Southwest Airlines 6 2026-07-26
SWA817 - 5 2026-07-01
SWA691 - 5 2026-07-01
SWA4109 - 5 2026-07-15
SWA2785 Southwest Airlines 5 2026-05-30
SWA2316 - 5 2026-07-16
SWA587 Southwest Airlines 4 2026-07-26
SWA3445 Southwest Airlines 4 2026-04-16
SWA2809 Southwest Airlines 4 2026-06-18
SWA1986 - 4 2026-06-22
SWA1735 - 4 2026-07-13
SWA1691 Southwest Airlines 4 2026-04-18
SWA1603 Southwest Airlines 4 2026-05-26
SWA1057 Southwest Airlines 4 2026-05-01
SWA9000 - 3 2026-06-19
SWA655 - 3 2026-07-16
SWA603 Southwest Airlines 3 2026-04-18
SWA501 Southwest Airlines 3 2026-05-15
SWA456 Southwest Airlines 3 2026-07-22

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SWA587 CUN → AUS Jul 26, 22:15 UTCJul 26, 22:45 UTC30m
2026-07-26 SWA169 AUS → SJC Jul 26, 16:45 UTCJul 26, 20:55 UTC4h 10m
2026-07-26 SWA4348 SRQ → ATL Jul 26, 13:45 UTCJul 26, 14:55 UTC1h 10m
2026-07-26 SWA3082 MDW → PHL Jul 26, 03:50 UTCJul 26, 04:45 UTC55m
2026-07-26 SWA3082 MDW → PHL Jul 26, 03:49 UTCJul 26, 04:38 UTC49m
2026-07-26 SWA372 SEA → OAK Jul 26, 00:40 UTCJul 26, 03:05 UTC2h 25m
2026-07-25 SWA1478 MCI → MCO Jul 25, 21:50 UTCJul 25, 23:28 UTC1h 38m
2026-07-25 SWA1478 MCI → MCO Jul 25, 21:55 UTCJul 25, 23:30 UTC1h 35m
2026-07-25 SWA2711 AUS → DEN Jul 25, 18:38 UTCJul 25, 20:22 UTC1h 44m
2026-07-25 SWA2711 AUS → DEN Jul 25, 18:40 UTCJul 25, 20:25 UTC1h 45m
2026-07-25 SWA3679 SJC → SEA Jul 25, 14:40 UTCJul 25, 17:15 UTC2h 35m
2026-07-25 SWA512 BWI → BUF Jul 25, 11:35 UTCJul 25, 12:45 UTC1h 10m
2026-07-25 SWA512 BWI → BUF Jul 25, 07:50 UTCJul 25, 08:05 UTC15m
2026-07-24 SWA2879 MDW → ALB Jul 24, 23:40 UTCJul 24, 23:55 UTC15m
2026-07-24 SWA2879 MDW → ALB Jul 24, 18:40 UTCJul 24, 19:15 UTC35m
2026-07-24 SWA1254 BDL → BWI Jul 24, 15:50 UTCJul 24, 16:50 UTC1h 0m
2026-07-24 SWA3150 SJC → DEN Jul 24, 12:50 UTCJul 24, 13:30 UTC40m
2026-07-24 SWA223 SJC → LAS Jul 24, 06:05 UTCJul 24, 06:55 UTC50m
2026-07-24 SWA223 SJC → LAS Jul 24, 06:04 UTCJul 24, 06:50 UTC46m
2026-07-24 SWA2955 SAT → MCI Jul 24, 01:50 UTCJul 24, 04:55 UTC3h 5m
2026-07-23 SWA1629 BNA → BOS Jul 23, 22:50 UTCJul 24, 00:45 UTC1h 55m
2026-07-23 SWA4826 PDX → PHX Jul 23, 19:25 UTCJul 23, 21:45 UTC2h 20m
2026-07-23 SWA2246 PDX → OAK Jul 23, 15:00 UTCJul 23, 18:05 UTC3h 5m
2026-07-23 SWA3106 TPA → CMH Jul 23, 12:00 UTCJul 23, 13:25 UTC1h 25m
2026-07-23 SWA2045 BNA → ISP Jul 23, 03:35 UTCJul 23, 05:28 UTC1h 53m
2026-07-23 SWA2045 BNA → ISP Jul 23, 03:40 UTCJul 23, 05:35 UTC1h 55m
2026-07-22 SWA1942 MDW → MCO Jul 22, 21:37 UTCJul 23, 02:00 UTC4h 23m
2026-07-22 SWA456 DEN → PHX Jul 22, 14:15 UTCJul 22, 19:55 UTC5h 40m
2026-07-22 SWA4352 IND → AUS Jul 22, 02:55 UTCJul 22, 03:50 UTC55m
2026-07-21 SWA2021 SJD → PHX Jul 21, 22:55 UTCJul 21, 23:55 UTC1h 0m
2026-07-21 SWA722 DEN → SJD Jul 21, 18:21 UTCJul 21, 20:50 UTC2h 29m
2026-07-21 SWA722 DEN → SJD Jul 21, 18:25 UTCJul 21, 19:25 UTC1h 0m
2026-07-21 SWA240 DEN → TUL Jul 21, 14:45 UTCJul 21, 16:10 UTC1h 25m
2026-07-21 SWA240 DEN → TUL Jul 21, 14:44 UTCJul 21, 16:07 UTC1h 23m
2026-07-21 SWA2277 - Jul 21, 07:15 UTCJul 21, 12:35 UTC5h 20m
2026-07-20 SWA2240 - Jul 20, 17:45 UTCJul 20, 23:35 UTC5h 50m
2026-07-20 SWA4348 OAK → LAS Jul 20, 14:50 UTCJul 20, 16:00 UTC1h 10m
2026-07-20 SWA2523 SJC → SNA Jul 20, 11:15 UTCJul 20, 12:05 UTC50m
2026-07-19 SWA3058 OAK → LIH Jul 19, 20:55 UTCJul 20, 02:00 UTC5h 5m
2026-07-19 SWA3058 - Jul 19, 20:55 UTCJul 19, 21:30 UTC35m
2026-07-19 SWA3366 BNA → SAT Jul 19, 15:45 UTCJul 19, 19:25 UTC3h 40m
2026-07-19 SWA3366 BNA → SAT Jul 19, 15:41 UTCJul 19, 19:24 UTC3h 43m
2026-07-19 SWA1189 BWI → LAX Jul 19, 03:20 UTCJul 19, 05:05 UTC1h 45m
2026-07-19 SWA1189 BWI → LAX Jul 19, 03:16 UTCJul 19, 05:01 UTC1h 45m
2026-07-19 SWA2134 ISP → TPA Jul 19, 00:48 UTCJul 19, 01:27 UTC39m
2026-07-18 SWA587 CUN → AUS Jul 18, 20:05 UTCJul 18, 22:10 UTC2h 5m
2026-07-18 SWA587 CUN → AUS Jul 18, 20:03 UTCJul 18, 22:07 UTC2h 4m
2026-07-18 SWA144 ABQ → HOU Jul 18, 15:35 UTCJul 18, 18:20 UTC2h 45m
2026-07-18 SWA144 ABQ → HOU Jul 18, 15:32 UTCJul 18, 18:18 UTC2h 46m
2026-07-18 SWA2856 DAL → MCI Jul 18, 12:51 UTCJul 18, 13:56 UTC1h 5m

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 N8728Q page for operator, model, and routing details .

Mode-S AC0143 frequently asked

What is Mode-S code AC0143?
AC0143 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N8728Q.
Where is Mode-S AC0143 registered?
Mode-S code AC0143 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 AC0143 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:45 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AC0143, octal 53000503, decimal 11,272,515.
What flights does AC0143 operate?
Mode-S AC0143 has broadcast 20 distinct callsigns, including SWA2848, SWA169, SWA817, SWA691, SWA4109.