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sensors Mode-S transponder

AA9B42

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N7827A · BOEING 737-700 · operated by SOUTHWEST AIRLINES CO

Hex
AA9B42
Octal
52515502
Decimal
11,180,866
Country
US
Tail
N7827A
Type
B737
Broadcasting now · callsign SWA854 · 39,950 ft
Flights observed
596
Distinct callsigns
20
Country
US
Last broadcast
1h ago

Current position

AA9B42 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address AA9B42 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
SWA121 - 7 2026-07-08
SWA1207 Southwest Airlines 7 2026-06-07
SWA3721 - 6 2026-04-13
SWA181 - 6 2026-07-13
SWA866 Southwest Airlines 5 2026-05-18
SWA328 Southwest Airlines 5 2026-06-26
SWA317 Southwest Airlines 5 2026-05-20
SWA267 Southwest Airlines 5 2026-05-05
SWA982 - 4 2026-07-14
SWA980 Southwest Airlines 4 2026-04-18
SWA971 - 4 2026-04-16
SWA757 - 4 2026-04-13
SWA550 - 4 2026-07-05
SWA50 Southwest Airlines 4 2026-04-28
SWA4524 - 4 2026-07-12
SWA4301 - 4 2026-06-25
SWA3498 Southwest Airlines 4 2026-05-21
SWA3243 Southwest Airlines 4 2026-04-29
SWA3223 Southwest Airlines 4 2026-05-26
SWA1776 Southwest Airlines 4 2026-05-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-15 SWA678 OAK → BUR Jul 15, 01:10 UTCJul 15, 02:05 UTC55m
2026-07-14 SWA3155 - Jul 14, 23:15 UTCJul 15, 00:05 UTC50m
2026-07-14 SWA3155 ONT → OAK Jul 14, 23:10 UTCJul 15, 00:00 UTC50m
2026-07-14 SWA3155 LAS → ONT Jul 14, 21:40 UTCJul 14, 22:15 UTC35m
2026-07-14 SWA4448 SAN → LAS Jul 14, 19:29 UTCJul 14, 20:21 UTC52m
2026-07-14 SWA4448 - Jul 14, 19:30 UTCJul 14, 20:20 UTC50m
2026-07-14 SWA3698 - Jul 14, 17:15 UTCJul 14, 18:25 UTC1h 10m
2026-07-14 SWA3698 SJC → SAN Jul 14, 17:12 UTCJul 14, 18:19 UTC1h 7m
2026-07-14 SWA3859 - Jul 14, 15:05 UTCJul 14, 16:00 UTC55m
2026-07-14 SWA4107 - Jul 14, 05:00 UTCJul 14, 05:50 UTC50m
2026-07-14 SWA4107 PHX → SNA Jul 14, 04:58 UTCJul 14, 05:49 UTC51m
2026-07-14 SWA982 - Jul 14, 01:30 UTCJul 14, 03:55 UTC2h 25m
2026-07-14 SWA982 PHX → OKC Jul 14, 01:26 UTCJul 14, 03:50 UTC2h 24m
2026-07-13 SWA1203 - Jul 13, 20:45 UTCJul 14, 00:00 UTC3h 15m
2026-07-13 SWA1203 SJO → HOU Jul 13, 20:41 UTCJul 14, 00:00 UTC3h 19m
2026-07-13 SWA181 - Jul 13, 16:05 UTCJul 13, 16:30 UTC25m
2026-07-13 SWA181 MCO → SJO Jul 13, 16:05 UTCJul 13, 18:45 UTC2h 40m
2026-07-13 SWA3011 - Jul 13, 12:15 UTCJul 13, 13:40 UTC1h 25m
2026-07-13 SWA4567 - Jul 13, 02:30 UTCJul 13, 04:45 UTC2h 15m
2026-07-12 SWA3977 - Jul 12, 23:15 UTCJul 13, 01:25 UTC2h 10m
2026-07-12 SWA3977 MIA → BWI Jul 12, 23:12 UTCJul 13, 01:21 UTC2h 10m
2026-07-12 SWA4524 - Jul 12, 19:20 UTCJul 12, 22:00 UTC2h 40m
2026-07-12 SWA4524 MCI → MIA Jul 12, 19:17 UTCJul 12, 21:56 UTC2h 39m
2026-07-12 SWA4524 - Jul 12, 16:45 UTCJul 12, 18:15 UTC1h 30m
2026-07-12 SWA4524 - Jul 12, 14:55 UTCJul 12, 15:50 UTC55m
2026-07-12 SWA4282 - Jul 12, 12:45 UTCJul 12, 13:45 UTC1h 0m
2026-07-12 SWA869 - Jul 12, 10:45 UTCJul 12, 11:30 UTC45m
2026-07-11 SWA2986 MSY → BWI Jul 11, 22:45 UTCJul 12, 01:00 UTC2h 15m
2026-07-11 SWA1027 CUN → MSY Jul 11, 19:15 UTCJul 11, 20:50 UTC1h 35m
2026-07-11 SWA305 - Jul 11, 16:10 UTCJul 11, 18:00 UTC1h 50m
2026-07-11 SWA1432 - Jul 11, 10:15 UTCJul 11, 12:55 UTC2h 40m
2026-07-11 SWA4888 - Jul 11, 02:40 UTCJul 11, 05:10 UTC2h 30m
2026-07-11 SWA4888 HOU → DCA Jul 11, 02:35 UTCJul 11, 05:02 UTC2h 27m
2026-07-10 SWA4230 - Jul 10, 23:20 UTCJul 11, 01:35 UTC2h 15m
2026-07-10 SWA4230 BNA → CHS Jul 10, 23:20 UTCJul 11, 01:34 UTC2h 14m
2026-07-10 SWA4030 - Jul 10, 18:10 UTCJul 10, 20:15 UTC2h 5m
2026-07-10 SWA4029 PPM → BNA Jul 10, 15:05 UTCJul 10, 16:55 UTC1h 50m
2026-07-10 SWA4029 FLL → BNA Jul 10, 15:01 UTCJul 10, 16:50 UTC1h 49m
2026-07-10 SWA516 - Jul 10, 12:20 UTCJul 10, 14:10 UTC1h 50m
2026-07-10 SWA2191 LAS → BNA Jul 10, 07:25 UTCJul 10, 10:45 UTC3h 20m
2026-07-10 SWA2191 LAS → BNA Jul 10, 07:25 UTCJul 10, 10:40 UTC3h 15m
2026-07-10 SWA1567 DEN → LAS Jul 10, 05:00 UTCJul 10, 06:25 UTC1h 25m
2026-07-10 SWA4639 - Jul 10, 00:50 UTCJul 10, 03:25 UTC2h 35m
2026-07-09 SWA1203 - Jul 9, 20:10 UTCJul 9, 23:05 UTC2h 55m
2026-07-09 SWA181 OAK → PSP Jul 9, 15:55 UTCJul 9, 18:20 UTC2h 25m
2026-07-09 SWA4869 PHL → MDW Jul 9, 11:10 UTCJul 9, 12:30 UTC1h 20m
2026-07-09 SWA4869 PHL → MDW Jul 9, 11:10 UTCJul 9, 13:28 UTC2h 18m
2026-07-08 SWA4898 - Jul 8, 22:10 UTCJul 9, 00:30 UTC2h 20m
2026-07-08 SWA1025 CUN → MCO Jul 8, 18:15 UTCJul 8, 19:50 UTC1h 35m
2026-07-08 SWA1025 CUN → MCO Jul 8, 18:15 UTCJul 8, 19:45 UTC1h 31m

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 N7827A page for operator, model, and routing details .

Mode-S AA9B42 frequently asked

What is Mode-S code AA9B42?
AA9B42 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N7827A.
Where is Mode-S AA9B42 registered?
Mode-S code AA9B42 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 AA9B42 broadcasting right now?
Yes. Mode-S AA9B42 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AA9B42, octal 52515502, decimal 11,180,866.
What flights does AA9B42 operate?
Mode-S AA9B42 has broadcast 20 distinct callsigns, including SWA121, SWA1207, SWA3721, SWA181, SWA866.