Apparatus

Try JFK, AAL1290, BAW, or N225AN.

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 1h ago
Flights observed
524
Distinct callsigns
20
Country
US
Last broadcast
1h ago

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
SWA817 - 5 2026-07-01
SWA691 - 5 2026-07-01
SWA2785 Southwest Airlines 5 2026-05-30
SWA169 - 5 2026-06-27
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
SWA603 Southwest Airlines 3 2026-04-18
SWA501 Southwest Airlines 3 2026-05-15
SWA4527 - 3 2026-07-07
SWA4452 Southwest Airlines 3 2026-06-24
SWA4109 - 3 2026-07-03
SWA397 Southwest Airlines 3 2026-05-27
SWA3540 - 3 2026-06-19

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 SWA2232 DEN → TPA Jul 14, 02:45 UTCJul 14, 05:45 UTC3h 0m
2026-07-13 SWA1018 CUN → DEN Jul 13, 20:45 UTCJul 14, 00:35 UTC3h 50m
2026-07-13 SWA1735 PHX → CUN Jul 13, 15:26 UTCJul 13, 19:05 UTC3h 39m
2026-07-13 SWA1735 - Jul 13, 15:30 UTCJul 13, 19:10 UTC3h 40m
2026-07-13 SWA374 AUS → PHX Jul 13, 11:50 UTCJul 13, 13:45 UTC1h 55m
2026-07-13 SWA4610 - Jul 13, 04:30 UTCJul 13, 05:01 UTC30m
2026-07-13 SWA4025 - Jul 13, 01:05 UTCJul 13, 02:50 UTC1h 45m
2026-07-12 SWA4546 - Jul 12, 21:40 UTCJul 12, 23:50 UTC2h 10m
2026-07-12 SWA1456 PHL → MDW Jul 12, 18:45 UTCJul 12, 20:21 UTC1h 36m
2026-07-12 SWA1456 - Jul 12, 15:25 UTCJul 12, 17:25 UTC2h 0m
2026-07-12 SWA4146 - Jul 12, 10:50 UTCJul 12, 13:05 UTC2h 15m
2026-07-12 SWA4146 AUS → MCO Jul 12, 10:50 UTCJul 12, 13:03 UTC2h 13m
2026-07-12 SWA454 - Jul 12, 04:35 UTCJul 12, 06:20 UTC1h 45m
2026-07-12 SWA2338 BOS → BNA Jul 12, 00:36 UTCJul 12, 02:58 UTC2h 22m
2026-07-12 SWA2338 - Jul 12, 00:40 UTCJul 12, 02:45 UTC2h 5m
2026-07-11 SWA3065 - Jul 11, 21:20 UTCJul 11, 22:40 UTC1h 20m
2026-07-11 SWA3065 BWI → BOS Jul 11, 21:19 UTCJul 11, 22:36 UTC1h 17m
2026-07-11 SWA1608 - Jul 11, 19:05 UTCJul 11, 19:30 UTC25m
2026-07-11 SWA1608 - Jul 11, 16:15 UTCJul 11, 19:00 UTC2h 45m
2026-07-11 SWA1976 - Jul 11, 12:00 UTCJul 11, 15:00 UTC3h 0m
2026-07-11 SWA1976 IND → CUN Jul 11, 11:59 UTCJul 11, 14:52 UTC2h 53m
2026-07-11 SWA319 AUS → IND Jul 11, 02:42 UTCJul 11, 04:43 UTC2h 1m
2026-07-11 SWA319 AUS → IND Jul 11, 02:45 UTCJul 11, 04:50 UTC2h 5m
2026-07-10 SWA587 CUN → AUS Jul 10, 22:00 UTCJul 11, 00:35 UTC2h 35m
2026-07-10 SWA131 DEN → CUN Jul 10, 16:45 UTCJul 10, 20:10 UTC3h 25m
2026-07-10 SWA4019 TPA → DEN Jul 10, 11:45 UTCJul 10, 14:55 UTC3h 10m
2026-07-09 SWA2441 - Jul 9, 23:25 UTCJul 10, 03:45 UTC4h 20m
2026-07-09 SWA4882 - Jul 9, 17:50 UTCJul 9, 22:10 UTC4h 20m
2026-07-09 SWA2762 DEN → TPA Jul 9, 12:50 UTCJul 9, 15:55 UTC3h 5m
2026-07-09 SWA2045 SMF → DEN Jul 9, 03:05 UTCJul 9, 04:55 UTC1h 50m
2026-07-08 SWA1942 - Jul 8, 21:10 UTCJul 9, 01:50 UTC4h 40m
2026-07-08 SWA456 - Jul 8, 19:25 UTCJul 8, 19:45 UTC20m
2026-07-08 SWA456 - Jul 8, 14:20 UTCJul 8, 14:50 UTC30m
2026-07-07 SWA4971 - Jul 7, 22:25 UTCJul 8, 03:10 UTC4h 45m
2026-07-07 SWA4527 - Jul 7, 20:10 UTCJul 7, 20:30 UTC20m
2026-07-07 SWA4527 - Jul 7, 15:10 UTCJul 7, 15:50 UTC40m
2026-07-07 SWA4527 ONT → HNL Jul 7, 15:07 UTCJul 7, 20:23 UTC5h 16m
2026-07-07 SWA1663 DEN → ONT Jul 7, 04:15 UTCJul 7, 06:05 UTC1h 50m
2026-07-07 SWA4246 - Jul 7, 00:45 UTCJul 7, 02:45 UTC2h 0m
2026-07-07 SWA4246 SJC → DEN Jul 7, 00:44 UTCJul 7, 02:45 UTC2h 1m
2026-07-06 SWA1940 SJC → DEN Jul 6, 23:00 UTCJul 6, 23:35 UTC35m
2026-07-06 SWA3091 - Jul 6, 16:10 UTCJul 6, 16:30 UTC20m
2026-07-06 SWA508 SJC → PHX Jul 6, 06:50 UTCJul 6, 07:10 UTC20m
2026-07-06 SWA508 SJC → PHX Jul 6, 06:47 UTCJul 6, 07:09 UTC22m
2026-07-06 SWA3098 - Jul 6, 05:15 UTCJul 6, 05:35 UTC20m
2026-07-06 SWA1933 - Jul 6, 03:40 UTCJul 6, 04:00 UTC20m
2026-07-06 SWA2169 KOA → HNL Jul 6, 01:50 UTCJul 6, 02:25 UTC35m
2026-07-05 SWA561 SJC → HNL Jul 5, 23:45 UTCJul 6, 00:15 UTC30m
2026-07-05 SWA561 SJC → HNL Jul 5, 23:44 UTCJul 6, 00:12 UTC28m
2026-07-05 SWA2168 KOA → HNL Jul 5, 21:45 UTCJul 5, 22:15 UTC30m

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 1h ago.
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, SWA817, SWA691, SWA2785, SWA169.