Apparatus

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sensors Mode-S transponder

AA9B20

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N7826B · BOEING 737-700 · operated by SOUTHWEST AIRLINES CO

Hex
AA9B20
Octal
52515440
Decimal
11,180,832
Country
US
Tail
N7826B
Type
B737
No current signal · last broadcast 1h ago
Flights observed
630
Distinct callsigns
20
Country
US
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S AA9B20.

Country allocation

The ICAO 24-bit address AA9B20 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
SWA328 Southwest Airlines 5 2026-07-10
SWA1450 - 5 2026-06-24
SWA4004 - 4 2026-07-08
SWA3706 Southwest Airlines 4 2026-05-18
SWA3400 - 4 2026-04-13
SWA318 - 4 2026-07-10
SWA3070 - 4 2026-04-16
SWA1769 Southwest Airlines 4 2026-05-06
SWA1418 Southwest Airlines 4 2026-05-05
SWA1396 - 4 2026-07-02
SWA1382 - 4 2026-07-06
SWA1269 Southwest Airlines 4 2026-05-08
SWA1147 - 4 2026-06-21
SWA971 Southwest Airlines 3 2026-05-14
SWA799 - 3 2026-06-29
SWA700 Southwest Airlines 3 2026-04-25
SWA554 - 3 2026-06-23
SWA4219 Southwest Airlines 3 2026-06-06
SWA3908 Southwest Airlines 3 2026-06-02
SWA3884 Southwest Airlines 3 2026-06-15

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 SWA175 DEN → OKC Jul 14, 02:50 UTCJul 14, 04:00 UTC1h 10m
2026-07-13 SWA1743 MSY → DEN Jul 13, 23:25 UTCJul 14, 01:45 UTC2h 20m
2026-07-13 SWA1743 MSY → DEN Jul 13, 23:21 UTCJul 14, 01:41 UTC2h 20m
2026-07-13 SWA4793 - Jul 13, 21:25 UTCJul 13, 22:30 UTC1h 5m
2026-07-13 SWA4793 DAL → MSY Jul 13, 21:21 UTCJul 13, 22:31 UTC1h 10m
2026-07-13 SWA1401 - Jul 13, 18:30 UTCJul 13, 20:10 UTC1h 40m
2026-07-13 SWA2552 - Jul 13, 15:40 UTCJul 13, 17:15 UTC1h 35m
2026-07-13 SWA4215 - Jul 13, 12:35 UTCJul 13, 14:40 UTC2h 5m
2026-07-13 SWA8510 DCA → BWI Jul 13, 01:55 UTCJul 13, 02:10 UTC15m
2026-07-13 SWA8510 DCA → BWI Jul 13, 01:55 UTCJul 13, 02:20 UTC25m
2026-07-12 SWA3014 - Jul 12, 22:30 UTCJul 13, 00:55 UTC2h 25m
2026-07-12 SWA3014 - Jul 12, 20:30 UTCJul 12, 21:20 UTC50m
2026-07-12 SWA3014 - Jul 12, 17:45 UTCJul 12, 19:25 UTC1h 40m
2026-07-12 SWA3127 - Jul 12, 15:40 UTCJul 12, 16:45 UTC1h 5m
2026-07-12 SWA3127 OMA → DEN Jul 12, 15:37 UTCJul 12, 16:44 UTC1h 7m
2026-07-12 SWA819 - Jul 12, 03:20 UTCJul 12, 05:35 UTC2h 15m
2026-07-12 SWA819 PHX → OMA Jul 12, 03:20 UTCJul 12, 05:35 UTC2h 15m
2026-07-11 SWA1299 PHX → PHX Jul 11, 20:15 UTCJul 12, 01:50 UTC5h 35m
2026-07-11 SWA982 - Jul 11, 01:45 UTCJul 11, 03:50 UTC2h 5m
2026-07-11 SWA982 HOU → PHX Jul 11, 01:40 UTCJul 11, 03:52 UTC2h 13m
2026-07-10 SWA328 CUN → HOU Jul 10, 20:55 UTCJul 10, 21:15 UTC20m
2026-07-10 SWA328 CUN → HOU Jul 10, 19:30 UTCJul 10, 20:00 UTC30m
2026-07-10 SWA318 MCO → CUN Jul 10, 16:25 UTCJul 10, 18:00 UTC1h 35m
2026-07-10 SWA4183 - Jul 10, 13:05 UTCJul 10, 15:00 UTC1h 55m
2026-07-10 SWA3919 - Jul 10, 10:10 UTCJul 10, 11:55 UTC1h 45m
2026-07-10 SWA1118 - Jul 10, 03:40 UTCJul 10, 05:25 UTC1h 45m
2026-07-10 SWA1118 BWI → STL Jul 10, 03:37 UTCJul 10, 05:23 UTC1h 46m
2026-07-10 SWA1118 - Jul 10, 00:35 UTCJul 10, 02:25 UTC1h 50m
2026-07-09 SWA569 - Jul 9, 20:25 UTCJul 9, 21:50 UTC1h 25m
2026-07-09 SWA569 BNA → MCO Jul 9, 20:22 UTCJul 9, 21:49 UTC1h 28m
2026-07-09 SWA1275 - Jul 9, 17:30 UTCJul 9, 19:00 UTC1h 30m
2026-07-09 SWA1275 DAL → BNA Jul 9, 17:28 UTCJul 9, 18:51 UTC1h 23m
2026-07-09 SWA4318 - Jul 9, 15:15 UTCJul 9, 16:35 UTC1h 20m
2026-07-09 SWA4318 STL → OMA Jul 9, 13:25 UTCJul 9, 14:20 UTC55m
2026-07-09 SWA1165 - Jul 9, 10:30 UTCJul 9, 11:35 UTC1h 5m
2026-07-08 SWA224 - Jul 8, 21:10 UTCJul 8, 22:10 UTC1h 0m
2026-07-08 SWA4004 TPA → BNA Jul 8, 18:30 UTCJul 8, 20:00 UTC1h 30m
2026-07-08 SWA3986 - Jul 8, 15:30 UTCJul 8, 17:30 UTC2h 0m
2026-07-08 SWA2973 MSP → STL Jul 8, 13:10 UTCJul 8, 14:15 UTC1h 5m
2026-07-08 SWA2677 DEN → MSP Jul 8, 03:00 UTCJul 8, 04:25 UTC1h 25m
2026-07-07 SWA4639 - Jul 7, 23:25 UTCJul 8, 01:55 UTC2h 30m
2026-07-07 SWA4639 HOU → DEN Jul 7, 23:22 UTCJul 8, 01:46 UTC2h 25m
2026-07-07 SWA328 CUN → HOU Jul 7, 19:35 UTCJul 7, 21:20 UTC1h 45m
2026-07-07 SWA328 CUN → HOU Jul 7, 19:33 UTCJul 7, 21:23 UTC1h 51m
2026-07-07 SWA318 MCO → CUN Jul 7, 16:40 UTCJul 7, 18:15 UTC1h 35m
2026-07-07 SWA318 MCO → CUN Jul 7, 16:39 UTCJul 7, 18:15 UTC1h 36m
2026-07-07 SWA1349 RNO → OAK Jul 7, 13:10 UTCJul 7, 15:20 UTC2h 10m
2026-07-07 SWA1636 - Jul 7, 11:25 UTCJul 7, 12:05 UTC40m
2026-07-07 SWA606 - Jul 7, 03:25 UTCJul 7, 05:15 UTC1h 50m
2026-07-06 SWA1382 LAS → DEN Jul 6, 23:45 UTCJul 7, 01:10 UTC1h 25m

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 N7826B page for operator, model, and routing details .

Mode-S AA9B20 frequently asked

What is Mode-S code AA9B20?
AA9B20 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N7826B.
Where is Mode-S AA9B20 registered?
Mode-S code AA9B20 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 AA9B20 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 AA9B20, octal 52515440, decimal 11,180,832.
What flights does AA9B20 operate?
Mode-S AA9B20 has broadcast 20 distinct callsigns, including SWA328, SWA1450, SWA4004, SWA3706, SWA3400.