Apparatus

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sensors Mode-S transponder

A1AA4E

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N206WN · BOEING 737-700 · operated by SOUTHWEST AIRLINES CO

Hex
A1AA4E
Octal
50325116
Decimal
10,594,894
Country
US
Tail
N206WN
Type
B737
No current signal · last broadcast 1h ago
Flights observed
688
Distinct callsigns
20
Country
US
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S A1AA4E.

Country allocation

The ICAO 24-bit address A1AA4E 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
SWA617 Southwest Airlines 6 2026-06-02
SWA416 Southwest Airlines 6 2026-04-16
SWA300 - 6 2026-06-20
SWA3144 - 5 2026-04-13
SWA1683 Southwest Airlines 5 2026-04-14
SWA1577 - 5 2026-07-07
SWA931 - 4 2026-07-02
SWA915 - 4 2026-07-01
SWA611 Southwest Airlines 4 2026-04-20
SWA478 Southwest Airlines 4 2026-06-06
SWA4355 - 4 2026-06-25
SWA401 - 4 2026-06-26
SWA2665 Southwest Airlines 4 2026-05-08
SWA2414 - 4 2026-07-04
SWA2098 Southwest Airlines 4 2026-05-29
SWA1723 Southwest Airlines 4 2026-05-06
SWA1466 Southwest Airlines 4 2026-04-25
SWA1432 Southwest Airlines 4 2026-06-11
SWA1192 Southwest Airlines 4 2026-05-13
SWA1121 Southwest Airlines 4 2026-05-24

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-15 SWA2043 - Jul 15, 02:20 UTCJul 15, 02:45 UTC25m
2026-07-14 SWA4073 - Jul 14, 23:45 UTCJul 15, 00:45 UTC1h 0m
2026-07-14 SWA4073 PIT → MDW Jul 14, 23:43 UTCJul 15, 00:44 UTC1h 1m
2026-07-14 SWA3451 - Jul 14, 20:35 UTCJul 14, 22:35 UTC2h 0m
2026-07-14 SWA3451 MCO → PIT Jul 14, 20:33 UTCJul 14, 22:36 UTC2h 3m
2026-07-14 SWA2036 - Jul 14, 00:10 UTCJul 14, 02:00 UTC1h 50m
2026-07-14 SWA2036 HOU → MCO Jul 14, 00:07 UTCJul 14, 01:59 UTC1h 52m
2026-07-13 SWA777 - Jul 13, 21:10 UTCJul 13, 23:10 UTC2h 0m
2026-07-13 SWA777 - Jul 13, 19:05 UTCJul 13, 20:20 UTC1h 15m
2026-07-13 SWA668 BUF → BNA Jul 13, 16:30 UTCJul 13, 18:00 UTC1h 30m
2026-07-13 SWA668 BUF → BNA Jul 13, 16:26 UTCJul 13, 17:54 UTC1h 28m
2026-07-13 SWA484 TPA → BUF Jul 13, 13:00 UTCJul 13, 15:25 UTC2h 25m
2026-07-13 SWA335 - Jul 13, 09:30 UTCJul 13, 11:55 UTC2h 25m
2026-07-13 SWA335 BDL → TPA Jul 13, 09:29 UTCJul 13, 11:55 UTC2h 26m
2026-07-13 SWA4757 - Jul 13, 03:01 UTCJul 13, 05:20 UTC2h 20m
2026-07-13 SWA3656 - Jul 13, 01:01 UTCJul 13, 02:05 UTC1h 5m
2026-07-12 SWA4702 MCO → BHM Jul 12, 22:54 UTCJul 13, 00:09 UTC1h 15m
2026-07-12 SWA4702 - Jul 12, 22:55 UTCJul 13, 00:05 UTC1h 10m
2026-07-12 SWA3408 - Jul 12, 19:55 UTCJul 12, 21:25 UTC1h 30m
2026-07-12 SWA3408 BNA → MCO Jul 12, 19:55 UTCJul 12, 21:23 UTC1h 28m
2026-07-12 SWA4604 MSY → BNA Jul 12, 15:20 UTCJul 12, 16:35 UTC1h 15m
2026-07-12 SWA1197 - Jul 12, 12:35 UTCJul 12, 14:25 UTC1h 50m
2026-07-12 SWA1197 - Jul 12, 10:30 UTCJul 12, 11:15 UTC45m
2026-07-12 SWA850 - Jul 12, 01:05 UTCJul 12, 01:55 UTC50m
2026-07-11 SWA2095 - Jul 11, 20:35 UTCJul 11, 23:10 UTC2h 35m
2026-07-11 SWA722 DEN → SJD Jul 11, 15:38 UTCJul 11, 18:01 UTC2h 23m
2026-07-11 SWA722 - Jul 11, 15:40 UTCJul 11, 16:35 UTC55m
2026-07-11 SWA2446 - Jul 11, 11:35 UTCJul 11, 12:50 UTC1h 15m
2026-07-11 SWA1574 - Jul 11, 04:55 UTCJul 11, 05:55 UTC1h 0m
2026-07-11 SWA1574 DEN → LBB Jul 11, 04:51 UTCJul 11, 05:51 UTC1h 0m
2026-07-11 SWA1304 DAL → DEN Jul 11, 01:35 UTCJul 11, 03:50 UTC2h 15m
2026-07-10 SWA1316 - Jul 10, 23:45 UTCJul 11, 00:35 UTC50m
2026-07-10 SWA1316 SAT → DAL Jul 10, 23:42 UTCJul 11, 00:30 UTC48m
2026-07-10 SWA1316 - Jul 10, 20:55 UTCJul 10, 22:50 UTC1h 55m
2026-07-10 SWA1478 SLC → DEN Jul 10, 18:40 UTCJul 10, 19:40 UTC1h 0m
2026-07-10 SWA4027 DEN → SLC Jul 10, 16:35 UTCJul 10, 17:40 UTC1h 5m
2026-07-10 SWA4027 DEN → SLC Jul 10, 16:35 UTCJul 10, 17:39 UTC1h 4m
2026-07-10 SWA1333 GEG → DEN Jul 10, 13:15 UTCJul 10, 15:00 UTC1h 45m
2026-07-10 SWA1538 DEN → GEG Jul 10, 05:35 UTCJul 10, 07:30 UTC1h 55m
2026-07-10 SWA670 SMF → DEN Jul 10, 02:30 UTCJul 10, 04:25 UTC1h 55m
2026-07-10 SWA670 SDF → PHX Jul 10, 02:26 UTCJul 10, 04:18 UTC1h 52m
2026-07-09 SWA3474 BUR → SMF Jul 9, 23:25 UTCJul 10, 00:20 UTC55m
2026-07-09 SWA1680 - Jul 9, 21:25 UTCJul 9, 22:25 UTC1h 0m
2026-07-09 SWA3232 - Jul 9, 18:50 UTCJul 9, 20:20 UTC1h 30m
2026-07-09 SWA835 BUR → SJC Jul 9, 17:05 UTCJul 9, 17:50 UTC45m
2026-07-09 SWA2929 DEN → BUR Jul 9, 13:55 UTCJul 9, 15:55 UTC2h 0m
2026-07-09 SWA1471 - Jul 9, 10:40 UTCJul 9, 12:30 UTC1h 50m
2026-07-09 SWA3979 - Jul 9, 02:25 UTCJul 9, 04:05 UTC1h 40m
2026-07-09 SWA2614 - Jul 9, 00:05 UTCJul 9, 01:05 UTC1h 0m
2026-07-08 SWA1790 - Jul 8, 19:10 UTCJul 8, 23:05 UTC3h 55m

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 N206WN page for operator, model, and routing details .

Mode-S A1AA4E frequently asked

What is Mode-S code A1AA4E?
A1AA4E is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N206WN.
Where is Mode-S A1AA4E registered?
Mode-S code A1AA4E 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 A1AA4E 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 A1AA4E, octal 50325116, decimal 10,594,894.
What flights does A1AA4E operate?
Mode-S A1AA4E has broadcast 20 distinct callsigns, including SWA617, SWA416, SWA300, SWA3144, SWA1683.