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sensors Mode-S transponder

AA9A57

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N7820L · BOEING 737-700 · operated by SOUTHWEST AIRLINES CO

Hex
AA9A57
Octal
52515127
Decimal
11,180,631
Country
US
Tail
N7820L
Type
B737
No current signal · last broadcast Jul 26, 21:45 UTC
Flights observed
636
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:45 UTC

Last known position

Most recent position reported by Mode-S AA9A57.

Country allocation

The ICAO 24-bit address AA9A57 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 9 2026-06-24
SWA318 Southwest Airlines 8 2026-06-28
SWA235 - 7 2026-06-21
SWA389 Southwest Airlines 5 2026-04-18
SWA3438 Southwest Airlines 5 2026-05-01
SWA300 - 5 2026-07-04
SWA294 Southwest Airlines 5 2026-07-20
SWA2808 Southwest Airlines 5 2026-05-24
SWA982 - 4 2026-06-20
SWA817 Southwest Airlines 4 2026-05-10
SWA353 - 4 2026-06-26
SWA3144 Southwest Airlines 4 2026-05-22
SWA295 Southwest Airlines 4 2026-07-23
SWA216 - 4 2026-07-12
SWA1571 Southwest Airlines 4 2026-04-18
SWA1402 Southwest Airlines 4 2026-06-09
SWA1203 - 4 2026-06-19
SWA104 Southwest Airlines 4 2026-07-24
SWA963 - 3 2026-07-15
SWA901 Southwest Airlines 3 2026-07-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SWA3682 MSY → MIA Jul 26, 20:50 UTCJul 26, 21:45 UTC55m
2026-07-26 SWA2765 SNA → DEN Jul 26, 18:46 UTCJul 26, 19:42 UTC56m
2026-07-26 SWA3868 MCI → SAN Jul 26, 16:10 UTCJul 26, 17:15 UTC1h 5m
2026-07-26 SWA901 SAT → MDW Jul 26, 00:05 UTCJul 26, 02:35 UTC2h 30m
2026-07-26 SWA901 SAT → MDW Jul 26, 00:04 UTCJul 26, 02:35 UTC2h 31m
2026-07-25 SWA901 SAT → MDW Jul 25, 22:10 UTCJul 25, 23:15 UTC1h 5m
2026-07-25 SWA4026 MDW → RSW Jul 25, 20:25 UTCJul 25, 21:15 UTC50m
2026-07-25 SWA4026 MDW → RSW Jul 25, 20:22 UTCJul 25, 21:13 UTC51m
2026-07-25 SWA3659 - Jul 25, 17:10 UTCJul 25, 19:00 UTC1h 50m
2026-07-25 SWA3659 MCO → HOU Jul 25, 17:08 UTCJul 25, 19:01 UTC1h 53m
2026-07-25 SWA3659 - Jul 25, 14:45 UTCJul 25, 16:15 UTC1h 30m
2026-07-25 SWA1209 FLL → BWI Jul 25, 12:25 UTCJul 25, 13:50 UTC1h 25m
2026-07-24 SWA104 RSW → BWI Jul 24, 23:50 UTCJul 25, 02:00 UTC2h 10m
2026-07-24 SWA104 RSW → BWI Jul 24, 23:44 UTCJul 25, 01:54 UTC2h 10m
2026-07-24 SWA3192 LAS → SFO Jul 24, 20:25 UTCJul 24, 22:55 UTC2h 30m
2026-07-24 SWA1044 BWI → PVD Jul 24, 17:00 UTCJul 24, 19:00 UTC2h 0m
2026-07-24 SWA4904 BUF → MCO Jul 24, 14:30 UTCJul 24, 15:10 UTC40m
2026-07-24 SWA1035 SMF → STL Jul 24, 13:10 UTCJul 24, 13:35 UTC25m
2026-07-24 SWA4612 SFO → PHX Jul 24, 10:15 UTCJul 24, 11:30 UTC1h 15m
2026-07-24 SWA4612 SFO → PHX Jul 24, 10:10 UTCJul 24, 11:23 UTC1h 14m
2026-07-24 SWA671 LGB → DAL Jul 24, 02:40 UTCJul 24, 03:15 UTC35m
2026-07-23 SWA261 DCA → MSY Jul 23, 23:40 UTCJul 24, 01:25 UTC1h 45m
2026-07-23 SWA1784 BLI → OAK Jul 23, 20:55 UTCJul 23, 22:25 UTC1h 30m
2026-07-23 SWA295 SJC → LAS Jul 23, 17:50 UTCJul 23, 19:25 UTC1h 35m
2026-07-23 SWA295 SJC → LAS Jul 23, 15:40 UTCJul 23, 16:30 UTC50m
2026-07-23 SWA295 SJC → LAS Jul 23, 15:35 UTCJul 23, 16:25 UTC50m
2026-07-23 SWA295 SJC → LAS Jul 23, 13:25 UTCJul 23, 15:05 UTC1h 40m
2026-07-23 SWA430 PHX → MCI Jul 23, 10:40 UTCJul 23, 11:15 UTC35m
2026-07-23 SWA4559 SEA → OAK Jul 23, 03:25 UTCJul 23, 04:00 UTC35m
2026-07-22 SWA2338 SNA → OAK Jul 22, 23:15 UTCJul 23, 01:45 UTC2h 30m
2026-07-22 SWA735 SJC → OGG Jul 22, 18:30 UTCJul 22, 21:40 UTC3h 10m
2026-07-22 SWA735 SJC → OGG Jul 22, 15:25 UTCJul 22, 17:30 UTC2h 5m
2026-07-22 SWA735 SJC → OGG Jul 22, 13:30 UTCJul 22, 14:15 UTC45m
2026-07-21 SWA65 DAL → HOU Jul 21, 23:40 UTCJul 22, 02:20 UTC2h 40m
2026-07-21 SWA5065 ELP → AUS Jul 21, 20:45 UTCJul 21, 21:59 UTC1h 14m
2026-07-21 SWA5065 AUS → AUS Jul 21, 18:35 UTCJul 21, 22:00 UTC3h 25m
2026-07-21 SWA3010 OAK → DAL Jul 21, 16:25 UTCJul 21, 17:20 UTC55m
2026-07-21 SWA3010 OAK → DAL Jul 21, 14:15 UTCJul 21, 15:55 UTC1h 40m
2026-07-21 SWA2114 ATL → DEN Jul 21, 10:20 UTCJul 21, 13:00 UTC2h 40m
2026-07-21 SWA4968 MCI → IND Jul 21, 01:35 UTCJul 21, 02:50 UTC1h 15m
2026-07-20 SWA324 - Jul 20, 22:40 UTCJul 21, 00:35 UTC1h 55m
2026-07-20 SWA324 TPA → DCA Jul 20, 22:36 UTCJul 21, 00:34 UTC1h 59m
2026-07-20 SWA4442 LIH → LAX Jul 20, 19:40 UTCJul 20, 21:45 UTC2h 5m
2026-07-20 SWA4442 LIH → LAX Jul 20, 15:55 UTCJul 20, 16:45 UTC50m
2026-07-20 SWA2458 - Jul 20, 13:35 UTCJul 20, 14:35 UTC1h 0m
2026-07-20 SWA857 LAS → OAK Jul 20, 11:30 UTCJul 20, 12:25 UTC55m
2026-07-20 SWA2208 LAS → BWI Jul 20, 05:30 UTCJul 20, 09:50 UTC4h 20m
2026-07-20 SWA294 HOU → ELP Jul 20, 01:30 UTCJul 20, 03:40 UTC2h 10m
2026-07-19 SWA294 HOU → ELP Jul 19, 23:45 UTCJul 20, 00:45 UTC1h 0m
2026-07-19 SWA294 HOU → ELP Jul 19, 21:40 UTCJul 19, 22:25 UTC45m

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 N7820L page for operator, model, and routing details .

Mode-S AA9A57 frequently asked

What is Mode-S code AA9A57?
AA9A57 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N7820L.
Where is Mode-S AA9A57 registered?
Mode-S code AA9A57 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 AA9A57 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:45 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AA9A57, octal 52515127, decimal 11,180,631.
What flights does AA9A57 operate?
Mode-S AA9A57 has broadcast 20 distinct callsigns, including SWA328, SWA318, SWA235, SWA389, SWA3438.