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sensors Mode-S transponder

ABAA43

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N8504G · BOEING 737-800 · operated by SOUTHWEST AIRLINES CO

Hex
ABAA43
Octal
52725103
Decimal
11,250,243
Country
US
Tail
N8504G
Type
B738
Transponder active on ground
Flights observed
619
Distinct callsigns
20
Country
US
Last broadcast
2h ago

Last known position

Most recent position reported by Mode-S ABAA43.

Country allocation

The ICAO 24-bit address ABAA43 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
SWA4112 Southwest Airlines 4 2026-05-28
SWA4076 Southwest Airlines 4 2026-05-18
SWA3402 Southwest Airlines 4 2026-05-15
SWA2971 Southwest Airlines 4 2026-05-22
SWA273 Southwest Airlines 4 2026-06-12
SWA2402 - 4 2026-07-06
SWA185 Southwest Airlines 4 2026-07-08
SWA752 Southwest Airlines 3 2026-05-23
SWA7 - 3 2026-07-07
SWA485 - 3 2026-06-29
SWA450 - 3 2026-07-11
SWA4420 Southwest Airlines 3 2026-05-23
SWA4279 Southwest Airlines 3 2026-05-23
SWA4074 Southwest Airlines 3 2026-06-17
SWA3839 Southwest Airlines 3 2026-06-13
SWA3394 Southwest Airlines 3 2026-04-26
SWA3218 - 3 2026-06-17
SWA2939 Southwest Airlines 3 2026-06-04
SWA2861 - 3 2026-07-10
SWA2791 Southwest Airlines 3 2026-04-30

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 SWA3155 - Jul 13, 23:05 UTCJul 13, 23:55 UTC50m
2026-07-13 SWA3807 SMF → ONT Jul 13, 20:58 UTCJul 13, 22:06 UTC1h 8m
2026-07-13 SWA3807 SMF → ONT Jul 13, 21:00 UTCJul 13, 22:00 UTC1h 0m
2026-07-13 SWA3167 - Jul 13, 19:05 UTCJul 13, 20:00 UTC55m
2026-07-13 SWA3167 ONT → SMF Jul 13, 19:01 UTCJul 13, 19:58 UTC57m
2026-07-13 SWA431 PHX → ONT Jul 13, 17:15 UTCJul 13, 18:00 UTC45m
2026-07-13 SWA431 DEN → PHX Jul 13, 14:55 UTCJul 13, 16:15 UTC1h 20m
2026-07-13 SWA2546 - Jul 13, 12:15 UTCJul 13, 13:30 UTC1h 15m
2026-07-13 SWA2546 MCI → DEN Jul 13, 12:12 UTCJul 13, 13:25 UTC1h 14m
2026-07-13 SWA4698 - Jul 13, 07:20 UTCJul 13, 08:30 UTC1h 10m
2026-07-13 SWA3254 PHX → DAL Jul 13, 04:09 UTCJul 13, 06:16 UTC2h 8m
2026-07-13 SWA3254 - Jul 13, 04:10 UTCJul 13, 06:15 UTC2h 5m
2026-07-13 SWA701 LAS → PHX Jul 13, 00:30 UTCJul 13, 01:20 UTC50m
2026-07-12 SWA2016 DEN → LAS Jul 12, 21:35 UTCJul 12, 23:00 UTC1h 25m
2026-07-12 SWA2768 - Jul 12, 18:35 UTCJul 12, 18:45 UTC10m
2026-07-12 SWA2768 MDW → DEN Jul 12, 18:31 UTCJul 12, 20:25 UTC1h 54m
2026-07-12 SWA3149 - Jul 12, 15:35 UTCJul 12, 17:10 UTC1h 35m
2026-07-12 SWA3149 ORF → MDW Jul 12, 15:32 UTCJul 12, 17:12 UTC1h 40m
2026-07-12 SWA1470 - Jul 12, 13:01 UTCJul 12, 14:35 UTC1h 35m
2026-07-12 SWA1470 MDW → ORF Jul 12, 12:56 UTCJul 12, 14:31 UTC1h 35m
2026-07-12 SWA4057 - Jul 12, 10:25 UTCJul 12, 11:45 UTC1h 20m
2026-07-12 SWA1328 - Jul 12, 05:30 UTCJul 12, 06:35 UTC1h 5m
2026-07-12 SWA1328 DEN → DAL Jul 12, 01:40 UTCJul 12, 03:45 UTC2h 5m
2026-07-11 SWA450 - Jul 11, 21:20 UTCJul 12, 00:20 UTC3h 0m
2026-07-11 SWA450 BUF → DEN Jul 11, 21:16 UTCJul 12, 00:05 UTC2h 49m
2026-07-11 SWA3466 - Jul 11, 16:10 UTCJul 11, 18:45 UTC2h 35m
2026-07-11 SWA3466 PHX → BUF Jul 11, 16:10 UTCJul 11, 19:56 UTC3h 46m
2026-07-11 SWA1057 - Jul 11, 13:30 UTCJul 11, 15:10 UTC1h 40m
2026-07-11 SWA2429 - Jul 11, 04:55 UTCJul 11, 05:55 UTC1h 0m
2026-07-11 SWA2429 LAX → SFO Jul 11, 04:55 UTCJul 11, 05:46 UTC51m
2026-07-11 SWA2438 PHX → LAX Jul 11, 02:45 UTCJul 11, 03:40 UTC55m
2026-07-10 SWA2861 - Jul 10, 22:20 UTCJul 11, 01:30 UTC3h 10m
2026-07-10 SWA1358 - Jul 10, 19:25 UTCJul 10, 21:05 UTC1h 40m
2026-07-10 SWA4751 - Jul 10, 15:40 UTCJul 10, 18:15 UTC2h 35m
2026-07-10 SWA3545 - Jul 10, 11:30 UTCJul 10, 14:00 UTC2h 30m
2026-07-10 SWA296 - Jul 10, 04:30 UTCJul 10, 05:25 UTC55m
2026-07-10 SWA296 ELP → SAT Jul 10, 04:20 UTCJul 10, 05:25 UTC1h 5m
2026-07-10 SWA1822 - Jul 10, 02:30 UTCJul 10, 03:20 UTC50m
2026-07-10 SWA1822 SAT → ELP Jul 10, 02:26 UTCJul 10, 03:34 UTC1h 8m
2026-07-09 SWA2254 - Jul 9, 23:50 UTCJul 10, 01:35 UTC1h 45m
2026-07-09 SWA4129 - Jul 9, 20:35 UTCJul 9, 22:30 UTC1h 55m
2026-07-09 SWA2757 - Jul 9, 17:45 UTCJul 9, 19:35 UTC1h 50m
2026-07-09 SWA4037 MCO → MDW Jul 9, 13:40 UTCJul 9, 15:55 UTC2h 15m
2026-07-09 SWA4483 - Jul 9, 10:15 UTCJul 9, 12:05 UTC1h 50m
2026-07-09 SWA4583 - Jul 9, 00:10 UTCJul 9, 02:20 UTC2h 10m
2026-07-09 SWA4583 FLL → HOU Jul 9, 00:07 UTCJul 9, 02:19 UTC2h 12m
2026-07-08 SWA185 ATL → LGA Jul 8, 20:40 UTCJul 8, 22:55 UTC2h 15m
2026-07-08 SWA185 ATL → LGA Jul 8, 20:37 UTCJul 8, 22:52 UTC2h 16m
2026-07-08 SWA185 ATL → LGA Jul 8, 17:20 UTCJul 8, 19:15 UTC1h 55m
2026-07-08 SWA185 ATL → LGA Jul 8, 14:45 UTCJul 8, 16:10 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 N8504G page for operator, model, and routing details .

Mode-S ABAA43 frequently asked

What is Mode-S code ABAA43?
ABAA43 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N8504G.
Where is Mode-S ABAA43 registered?
Mode-S code ABAA43 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 ABAA43 broadcasting right now?
Mode-S ABAA43 is currently broadcasting from the ground.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex ABAA43, octal 52725103, decimal 11,250,243.
What flights does ABAA43 operate?
Mode-S ABAA43 has broadcast 20 distinct callsigns, including SWA4112, SWA4076, SWA3402, SWA2971, SWA273.