Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

AC042A

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N8732S · BOEING 737 MAX 8 · operated by UMB BANK NA TRUSTEE

Hex
AC042A
Octal
53002052
Decimal
11,273,258
Country
US
Tail
N8732S
Type
B38M
No current signal · last broadcast Jul 26, 18:40 UTC
Flights observed
696
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 18:40 UTC

Last known position

Most recent position reported by Mode-S AC042A.

Country allocation

The ICAO 24-bit address AC042A 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
SWA4109 - 5 2026-07-07
SWA3433 Southwest Airlines 5 2026-04-14
SWA3133 Southwest Airlines 5 2026-07-26
SWA241 Southwest Airlines 5 2026-04-18
SWA2397 - 5 2026-07-16
SWA444 Southwest Airlines 4 2026-04-15
SWA4080 Southwest Airlines 4 2026-05-05
SWA3596 Southwest Airlines 4 2026-05-30
SWA3094 - 4 2026-07-13
SWA2419 - 4 2026-07-17
SWA2081 Southwest Airlines 4 2026-05-28
SWA1931 - 4 2026-07-14
SWA1914 - 4 2026-06-23
SWA1890 Southwest Airlines 4 2026-06-02
SWA949 Southwest Airlines 3 2026-05-13
SWA9000 - 3 2026-07-12
SWA808 Southwest Airlines 3 2026-04-29
SWA4894 - 3 2026-07-13
SWA4452 - 3 2026-07-14
SWA4159 Southwest Airlines 3 2026-06-12

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SWA2240 LAX → MDW Jul 26, 17:40 UTCJul 26, 18:40 UTC1h 0m
2026-07-26 SWA2240 LAX → MDW Jul 26, 17:40 UTCJul 26, 23:30 UTC5h 50m
2026-07-26 SWA2711 AUS → DEN Jul 26, 10:45 UTCJul 26, 13:10 UTC2h 25m
2026-07-26 SWA3133 DEN → AUS Jul 26, 01:50 UTCJul 26, 04:15 UTC2h 25m
2026-07-25 SWA165 SAN → AUS Jul 25, 22:05 UTCJul 26, 00:40 UTC2h 35m
2026-07-25 SWA827 DEN → PHL Jul 25, 18:00 UTCJul 25, 20:20 UTC2h 20m
2026-07-25 SWA827 DEN → PHL Jul 25, 17:55 UTCJul 25, 20:20 UTC2h 25m
2026-07-25 SWA2034 SJC → LAS Jul 25, 14:45 UTCJul 25, 16:45 UTC2h 0m
2026-07-25 SWA4702 PDX → STL Jul 25, 11:50 UTCJul 25, 13:23 UTC1h 33m
2026-07-25 SWA4702 PDX → STL Jul 25, 04:20 UTCJul 25, 13:25 UTC9h 5m
2026-07-25 SWA4604 ATL → STL Jul 25, 00:50 UTCJul 25, 03:10 UTC2h 20m
2026-07-24 SWA3470 TPA → PHL Jul 24, 21:37 UTCJul 24, 23:48 UTC2h 11m
2026-07-24 SWA3470 TPA → PHL Jul 24, 21:40 UTCJul 24, 23:55 UTC2h 15m
2026-07-24 SWA2137 MDW → PHL Jul 24, 18:05 UTCJul 24, 20:20 UTC2h 15m
2026-07-24 SWA2137 MDW → PHL Jul 24, 18:04 UTCJul 24, 20:05 UTC2h 1m
2026-07-24 SWA1552 SJC → GEG Jul 24, 15:05 UTCJul 24, 17:00 UTC1h 55m
2026-07-24 SWA4803 MDW → LAX Jul 24, 12:20 UTCJul 24, 14:00 UTC1h 40m
2026-07-24 SWA3830 SAN → OAK Jul 24, 04:10 UTCJul 24, 05:45 UTC1h 35m
2026-07-23 SWA4072 PVD → TPA Jul 23, 23:05 UTCJul 24, 03:05 UTC4h 0m
2026-07-23 SWA4890 MDW → MCO Jul 23, 19:30 UTCJul 23, 22:00 UTC2h 30m
2026-07-23 SWA2830 SJC → SAN Jul 23, 15:55 UTCJul 23, 18:15 UTC2h 20m
2026-07-23 SWA4197 BWI → MDW Jul 23, 11:20 UTCJul 23, 14:30 UTC3h 10m
2026-07-23 SWA4197 BWI → MDW Jul 23, 11:17 UTCJul 23, 14:30 UTC3h 13m
2026-07-23 SWA1015 FLL → MSY Jul 23, 01:29 UTCJul 23, 03:11 UTC1h 42m
2026-07-23 SWA1015 FLL → MSY Jul 23, 01:30 UTCJul 23, 03:10 UTC1h 40m
2026-07-22 SWA3719 - Jul 22, 21:55 UTCJul 22, 23:40 UTC1h 45m
2026-07-22 SWA3719 - Jul 22, 20:10 UTCJul 22, 20:25 UTC15m
2026-07-22 SWA1656 MDW → BNA Jul 22, 18:35 UTCJul 22, 18:50 UTC15m
2026-07-22 SWA1656 MDW → BNA Jul 22, 16:20 UTCJul 22, 16:55 UTC35m
2026-07-22 SWA1656 MDW → BNA Jul 22, 16:17 UTCJul 22, 18:49 UTC2h 32m
2026-07-22 SWA6 - Jul 22, 13:00 UTCJul 22, 15:10 UTC2h 10m
2026-07-21 SWA16 - Jul 21, 21:40 UTCJul 21, 23:00 UTC1h 20m
2026-07-21 SWA16 ECP → HOU Jul 21, 21:39 UTCJul 21, 22:57 UTC1h 18m
2026-07-21 SWA23 DAL → HOU Jul 21, 19:25 UTCJul 21, 20:20 UTC55m
2026-07-21 SWA4015 MCI → SRQ Jul 21, 16:50 UTCJul 21, 18:25 UTC1h 35m
2026-07-21 SWA6 HOU → MCO Jul 21, 13:05 UTCJul 21, 15:10 UTC2h 5m
2026-07-21 SWA2244 SJC → SAN Jul 21, 04:25 UTCJul 21, 07:30 UTC3h 5m
2026-07-20 SWA2648 DEN → IND Jul 20, 22:53 UTCJul 21, 02:54 UTC4h 2m
2026-07-20 SWA2648 DEN → IND Jul 20, 22:55 UTCJul 21, 03:10 UTC4h 14m
2026-07-20 SWA4162 SAN → MCO Jul 20, 15:47 UTCJul 20, 20:25 UTC4h 39m
2026-07-20 SWA4162 - Jul 20, 15:50 UTCJul 20, 20:30 UTC4h 40m
2026-07-20 SWA153 MAF → DAL Jul 20, 13:15 UTCJul 20, 14:40 UTC1h 25m
2026-07-20 SWA383 LAX → SJC Jul 20, 05:55 UTCJul 20, 07:15 UTC1h 20m
2026-07-20 SWA383 LAX → SJC Jul 20, 05:51 UTCJul 20, 07:15 UTC1h 24m
2026-07-20 SWA2184 LAS → AUS Jul 20, 02:45 UTCJul 20, 05:05 UTC2h 20m
2026-07-20 SWA2184 - Jul 20, 00:50 UTCJul 20, 01:35 UTC45m
2026-07-19 SWA3831 BUR → SFO Jul 19, 22:45 UTCJul 19, 23:55 UTC1h 10m
2026-07-19 SWA104 - Jul 19, 17:10 UTCJul 19, 20:50 UTC3h 40m
2026-07-19 SWA1267 LGA → MDW Jul 19, 13:20 UTCJul 19, 15:15 UTC1h 55m
2026-07-19 SWA1267 LGA → MDW Jul 19, 13:18 UTCJul 19, 15:08 UTC1h 51m

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 N8732S page for operator, model, and routing details .

Mode-S AC042A frequently asked

What is Mode-S code AC042A?
AC042A is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N8732S.
Where is Mode-S AC042A registered?
Mode-S code AC042A 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 AC042A broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 18:40 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AC042A, octal 53002052, decimal 11,273,258.
What flights does AC042A operate?
Mode-S AC042A has broadcast 20 distinct callsigns, including SWA4109, SWA3433, SWA3133, SWA241, SWA2397.