Apparatus

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sensors Mode-S transponder

A1A2E0

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N204WN · BOEING 737-700 · operated by SOUTHWEST AIRLINES CO

Hex
A1A2E0
Octal
50321340
Decimal
10,592,992
Country
US
Tail
N204WN
Type
B737
No current signal · last broadcast 1h ago
Flights observed
666
Distinct callsigns
20
Country
US
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S A1A2E0.

Country allocation

The ICAO 24-bit address A1A2E0 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
SWA2582 Southwest Airlines 8 2026-05-18
SWA1045 Southwest Airlines 8 2026-05-21
SWA1219 Southwest Airlines 7 2026-05-09
SWA1159 Southwest Airlines 7 2026-05-18
SWA670 - 6 2026-07-04
SWA3888 - 6 2026-06-15
SWA2660 Southwest Airlines 6 2026-04-21
SWA9002 - 5 2026-07-10
SWA263 Southwest Airlines 5 2026-04-13
SWA2374 Southwest Airlines 5 2026-04-15
SWA114 Southwest Airlines 5 2026-06-12
SWA683 - 4 2026-06-27
SWA669 - 4 2026-06-21
SWA557 Southwest Airlines 4 2026-05-17
SWA4626 Southwest Airlines 4 2026-05-21
SWA3403 - 4 2026-07-01
SWA3123 Southwest Airlines 4 2026-04-25
SWA2957 Southwest Airlines 4 2026-05-02
SWA290 - 4 2026-07-12
SWA1569 Southwest Airlines 4 2026-04-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-15 SWA4479 - Jul 15, 01:15 UTCJul 15, 02:00 UTC45m
2026-07-14 SWA4380 BNA → DCA Jul 14, 21:35 UTCJul 14, 22:55 UTC1h 19m
2026-07-14 SWA2407 LGA → BNA Jul 14, 15:45 UTCJul 14, 17:30 UTC1h 45m
2026-07-14 SWA2407 LGA → BNA Jul 14, 15:44 UTCJul 14, 17:26 UTC1h 42m
2026-07-14 SWA2182 DAL → LGA Jul 14, 11:35 UTCJul 14, 14:45 UTC3h 10m
2026-07-14 SWA2182 DAL → LGA Jul 14, 11:35 UTCJul 14, 14:44 UTC3h 10m
2026-07-14 SWA3492 - Jul 14, 02:10 UTCJul 14, 04:45 UTC2h 35m
2026-07-13 SWA4910 SEA → SAN Jul 13, 22:09 UTCJul 14, 00:41 UTC2h 33m
2026-07-13 SWA4910 SEA → SAN Jul 13, 22:10 UTCJul 14, 00:50 UTC2h 40m
2026-07-13 SWA814 PHX → SEA Jul 13, 18:00 UTCJul 13, 20:20 UTC2h 20m
2026-07-13 SWA814 BUR → PHX Jul 13, 15:50 UTCJul 13, 17:00 UTC1h 10m
2026-07-13 SWA4909 SMF → BUR Jul 13, 13:45 UTCJul 13, 14:45 UTC1h 0m
2026-07-13 SWA4909 SMF → BUR Jul 13, 13:45 UTCJul 13, 14:43 UTC58m
2026-07-13 SWA854 BUR → SMF Jul 13, 04:00 UTCJul 13, 04:55 UTC55m
2026-07-13 SWA854 BUR → SMF Jul 13, 03:58 UTCJul 13, 04:51 UTC53m
2026-07-13 SWA3360 SMF → BUR Jul 13, 02:25 UTCJul 13, 03:20 UTC55m
2026-07-13 SWA1402 - Jul 13, 00:20 UTCJul 13, 01:30 UTC1h 10m
2026-07-12 SWA1402 - Jul 12, 20:30 UTCJul 12, 23:10 UTC2h 40m
2026-07-12 SWA2114 - Jul 12, 15:50 UTCJul 12, 19:15 UTC3h 25m
2026-07-12 SWA2114 PDX → OAK Jul 12, 13:05 UTCJul 12, 14:35 UTC1h 30m
2026-07-12 SWA290 - Jul 12, 03:35 UTCJul 12, 04:45 UTC1h 10m
2026-07-12 SWA290 SJC → PDX Jul 12, 03:32 UTCJul 12, 04:46 UTC1h 15m
2026-07-12 SWA290 - Jul 12, 00:40 UTCJul 12, 02:40 UTC2h 0m
2026-07-11 SWA290 AUS → DEN Jul 11, 21:25 UTCJul 11, 23:15 UTC1h 50m
2026-07-11 SWA4411 - Jul 11, 17:40 UTCJul 11, 20:15 UTC2h 35m
2026-07-11 SWA4003 AUS → SAN Jul 11, 13:55 UTCJul 11, 16:20 UTC2h 25m
2026-07-11 SWA4003 AUS → SAN Jul 11, 13:55 UTCJul 11, 16:19 UTC2h 25m
2026-07-11 SWA2976 MSY → AUS Jul 11, 11:20 UTCJul 11, 12:30 UTC1h 10m
2026-07-11 SWA4756 - Jul 11, 02:30 UTCJul 11, 03:20 UTC50m
2026-07-10 SWA9002 - Jul 10, 23:30 UTCJul 11, 01:20 UTC1h 50m
2026-07-10 SWA9002 OMA → HOU Jul 10, 23:28 UTCJul 11, 01:22 UTC1h 55m
2026-07-10 SWA2896 LGA → OMA Jul 10, 19:20 UTCJul 10, 22:05 UTC2h 45m
2026-07-10 SWA2896 - Jul 10, 19:20 UTCJul 10, 22:10 UTC2h 50m
2026-07-10 SWA3008 MSY → LGA Jul 10, 15:00 UTCJul 10, 17:25 UTC2h 25m
2026-07-10 SWA1796 - Jul 10, 13:10 UTCJul 10, 13:55 UTC45m
2026-07-10 SWA1233 - Jul 10, 10:50 UTCJul 10, 11:25 UTC35m
2026-07-10 SWA57 - Jul 10, 04:20 UTCJul 10, 04:55 UTC35m
2026-07-10 SWA2730 - Jul 10, 00:05 UTCJul 10, 02:45 UTC2h 40m
2026-07-09 SWA4195 DAL → DCA Jul 9, 19:20 UTCJul 9, 22:40 UTC3h 20m
2026-07-09 SWA4195 DAL → DCA Jul 9, 19:19 UTCJul 9, 22:35 UTC3h 16m
2026-07-09 SWA4195 - Jul 9, 16:50 UTCJul 9, 17:40 UTC50m
2026-07-09 SWA2617 - Jul 9, 14:55 UTCJul 9, 15:40 UTC45m
2026-07-09 SWA1517 DEN → DAL Jul 9, 12:25 UTCJul 9, 13:55 UTC1h 30m
2026-07-09 SWA1517 DEN → DAL Jul 9, 12:23 UTCJul 9, 13:51 UTC1h 28m
2026-07-09 SWA4225 SLC → DEN Jul 9, 03:55 UTCJul 9, 04:50 UTC55m
2026-07-09 SWA4225 LAS → SLC Jul 9, 02:00 UTCJul 9, 02:50 UTC50m
2026-07-08 SWA4810 STL → LAS Jul 8, 21:40 UTCJul 9, 00:40 UTC3h 0m
2026-07-08 SWA2 LAS → STL Jul 8, 16:10 UTCJul 8, 18:55 UTC2h 45m
2026-07-08 SWA4204 - Jul 8, 12:00 UTCJul 8, 15:05 UTC3h 5m
2026-07-08 SWA5061 SJC → LAS Jul 8, 00:50 UTCJul 8, 01:35 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 N204WN page for operator, model, and routing details .

Mode-S A1A2E0 frequently asked

What is Mode-S code A1A2E0?
A1A2E0 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N204WN.
Where is Mode-S A1A2E0 registered?
Mode-S code A1A2E0 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 A1A2E0 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 A1A2E0, octal 50321340, decimal 10,592,992.
What flights does A1A2E0 operate?
Mode-S A1A2E0 has broadcast 20 distinct callsigns, including SWA2582, SWA1045, SWA1219, SWA1159, SWA670.