Apparatus

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sensors Mode-S transponder

AA9E28

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N7831B · BOEING 737-700 · operated by SOUTHWEST AIRLINES CO

Hex
AA9E28
Octal
52517050
Decimal
11,181,608
Country
US
Tail
N7831B
Type
B737
No current signal · last broadcast 4h ago
Flights observed
616
Distinct callsigns
20
Country
US
Last broadcast
4h ago

Last known position

Most recent position reported by Mode-S AA9E28.

Country allocation

The ICAO 24-bit address AA9E28 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
SWA1080 Southwest Airlines 9 2026-06-04
SWA766 - 6 2026-07-01
SWA3255 - 6 2026-07-09
SWA3104 Southwest Airlines 6 2026-05-26
SWA2012 Southwest Airlines 6 2026-06-09
SWA576 Southwest Airlines 5 2026-04-24
SWA3016 Southwest Airlines 5 2026-07-09
SWA300 Southwest Airlines 5 2026-06-06
SWA1426 - 5 2026-06-28
SWA986 Southwest Airlines 4 2026-05-14
SWA4769 Southwest Airlines 4 2026-06-24
SWA3871 - 4 2026-07-06
SWA3342 - 4 2026-04-13
SWA3038 - 4 2026-07-12
SWA2644 Southwest Airlines 4 2026-06-01
SWA2314 Southwest Airlines 4 2026-06-03
SWA2117 Southwest Airlines 4 2026-05-28
SWA1565 - 4 2026-07-13
SWA9000 Southwest Airlines 3 2026-04-14
SWA868 Southwest Airlines 3 2026-06-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-15 SWA4745 - Jul 15, 00:35 UTCJul 15, 01:40 UTC1h 5m
2026-07-14 SWA4781 - Jul 14, 21:35 UTCJul 14, 23:20 UTC1h 44m
2026-07-14 SWA4533 - Jul 14, 18:25 UTCJul 14, 20:05 UTC1h 40m
2026-07-14 SWA2833 - Jul 14, 15:25 UTCJul 14, 17:35 UTC2h 10m
2026-07-14 SWA2309 LAS → PHX Jul 14, 13:05 UTCJul 14, 13:55 UTC50m
2026-07-14 SWA2309 LAS → PHX Jul 14, 13:05 UTCJul 14, 13:51 UTC46m
2026-07-14 SWA1567 DEN → LAS Jul 14, 05:50 UTCJul 14, 07:10 UTC1h 20m
2026-07-14 SWA1567 DEN → LAS Jul 14, 05:46 UTCJul 14, 07:08 UTC1h 22m
2026-07-14 SWA4639 - Jul 14, 03:00 UTCJul 14, 05:00 UTC2h 0m
2026-07-14 SWA4704 - Jul 14, 01:25 UTCJul 14, 02:10 UTC45m
2026-07-14 SWA4704 HRL → HOU Jul 14, 01:22 UTCJul 14, 02:09 UTC47m
2026-07-13 SWA1984 - Jul 13, 23:45 UTCJul 14, 00:25 UTC40m
2026-07-13 SWA881 SJD → HOU Jul 13, 18:56 UTCJul 13, 21:04 UTC2h 8m
2026-07-13 SWA150 - Jul 13, 15:30 UTCJul 13, 21:05 UTC5h 35m
2026-07-13 SWA3784 SMF → LAS Jul 13, 12:30 UTCJul 13, 13:35 UTC1h 5m
2026-07-13 SWA1565 - Jul 13, 05:05 UTCJul 13, 06:01 UTC55m
2026-07-13 SWA1565 ONT → SMF Jul 13, 05:04 UTCJul 13, 06:00 UTC56m
2026-07-13 SWA1565 LAS → ONT Jul 13, 03:45 UTCJul 13, 04:20 UTC35m
2026-07-13 SWA1565 DEN → LAS Jul 13, 01:10 UTCJul 13, 02:35 UTC1h 25m
2026-07-12 SWA2392 - Jul 12, 22:00 UTCJul 13, 00:01 UTC2h 0m
2026-07-12 SWA2392 LAX → DEN Jul 12, 21:56 UTCJul 12, 23:53 UTC1h 57m
2026-07-12 SWA2392 - Jul 12, 19:50 UTCJul 12, 20:50 UTC1h 0m
2026-07-12 SWA803 BUR → OAK Jul 12, 18:01 UTCJul 12, 18:50 UTC50m
2026-07-12 SWA3764 SMF → BUR Jul 12, 16:01 UTCJul 12, 17:01 UTC1h 0m
2026-07-12 SWA3544 - Jul 12, 13:50 UTCJul 12, 14:55 UTC1h 5m
2026-07-12 SWA3038 SMF → SAN Jul 12, 03:10 UTCJul 12, 04:25 UTC1h 15m
2026-07-12 SWA3038 SMF → SAN Jul 12, 03:10 UTCJul 12, 04:23 UTC1h 14m
2026-07-11 SWA3038 - Jul 11, 23:10 UTCJul 12, 02:10 UTC3h 0m
2026-07-11 SWA3038 - Jul 11, 20:00 UTCJul 11, 22:10 UTC2h 10m
2026-07-11 SWA2779 - Jul 11, 16:50 UTCJul 11, 18:15 UTC1h 25m
2026-07-11 SWA2779 - Jul 11, 15:30 UTCJul 11, 15:55 UTC25m
2026-07-11 SWA3805 SAV → MDW Jul 11, 12:14 UTCJul 11, 14:03 UTC1h 49m
2026-07-11 SWA3805 SAV → MDW Jul 11, 12:15 UTCJul 11, 14:00 UTC1h 45m
2026-07-11 SWA669 - Jul 11, 01:00 UTCJul 11, 02:00 UTC1h 0m
2026-07-10 SWA410 - Jul 10, 23:15 UTCJul 10, 23:50 UTC35m
2026-07-10 SWA410 - Jul 10, 21:00 UTCJul 10, 22:05 UTC1h 5m
2026-07-10 SWA680 - Jul 10, 17:45 UTCJul 10, 19:00 UTC1h 15m
2026-07-10 SWA680 TUL → HOU Jul 10, 17:40 UTCJul 10, 18:55 UTC1h 15m
2026-07-10 SWA680 MDW → TUL Jul 10, 15:20 UTCJul 10, 16:45 UTC1h 25m
2026-07-10 SWA1781 DTW → MDW Jul 10, 12:50 UTCJul 10, 13:35 UTC45m
2026-07-10 SWA1781 DTW → MDW Jul 10, 12:50 UTCJul 10, 13:37 UTC47m
2026-07-10 SWA942 - Jul 10, 03:55 UTCJul 10, 05:00 UTC1h 5m
2026-07-10 SWA1290 SAV → BWI Jul 10, 00:55 UTCJul 10, 03:05 UTC2h 10m
2026-07-09 SWA1290 DAL → SAV Jul 9, 21:30 UTCJul 9, 23:25 UTC1h 55m
2026-07-09 SWA3255 PHX → DAL Jul 9, 18:00 UTCJul 9, 19:55 UTC1h 55m
2026-07-09 SWA3255 PHX → DAL Jul 9, 17:56 UTCJul 9, 19:57 UTC2h 1m
2026-07-09 SWA3016 MDW → TPA Jul 9, 13:55 UTCJul 9, 17:00 UTC3h 5m
2026-07-09 SWA3016 MDW → TPA Jul 9, 12:05 UTCJul 9, 12:50 UTC45m
2026-07-09 SWA4522 - Jul 9, 02:10 UTCJul 9, 02:45 UTC35m
2026-07-08 SWA9003 CVG → BNA Jul 8, 22:49 UTCJul 8, 23:33 UTC44m

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 N7831B page for operator, model, and routing details .

Mode-S AA9E28 frequently asked

What is Mode-S code AA9E28?
AA9E28 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N7831B.
Where is Mode-S AA9E28 registered?
Mode-S code AA9E28 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 AA9E28 broadcasting right now?
No active broadcast right now. Last signal was 4h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AA9E28, octal 52517050, decimal 11,181,608.
What flights does AA9E28 operate?
Mode-S AA9E28 has broadcast 20 distinct callsigns, including SWA1080, SWA766, SWA3255, SWA3104, SWA2012.