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 Jul 26, 21:50 UTC
Flights observed
775
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:50 UTC

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
SWA1450 - 5 2026-07-21
SWA1321 - 5 2026-07-15
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

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SWA851 STL → LGA Jul 26, 20:50 UTCJul 26, 21:45 UTC55m
2026-07-26 SWA1577 LGA → STL Jul 26, 18:55 UTCJul 26, 19:50 UTC55m
2026-07-26 SWA1577 LGA → STL Jul 26, 15:50 UTCJul 26, 18:00 UTC2h 10m
2026-07-26 SWA4125 BWI → CVG Jul 26, 12:40 UTCJul 26, 14:35 UTC1h 55m
2026-07-26 SWA4280 ATL → BWI Jul 26, 05:40 UTCJul 26, 06:40 UTC1h 1m
2026-07-26 SWA570 MDW → MSP Jul 26, 03:45 UTCJul 26, 04:30 UTC45m
2026-07-26 SWA1322 OAK → BUR Jul 26, 02:20 UTCJul 26, 03:00 UTC40m
2026-07-26 SWA1322 OAK → BUR Jul 26, 02:16 UTCJul 26, 02:56 UTC40m
2026-07-26 SWA4606 ATL → STL Jul 26, 00:25 UTCJul 26, 01:15 UTC50m
2026-07-25 SWA4004 SEA → OAK Jul 25, 21:32 UTCJul 25, 23:05 UTC1h 33m
2026-07-25 SWA4004 SEA → OAK Jul 25, 21:35 UTCJul 25, 23:10 UTC1h 35m
2026-07-25 SWA4617 BWI → DEN Jul 25, 19:05 UTCJul 25, 20:30 UTC1h 25m
2026-07-25 SWA4617 BWI → DEN Jul 25, 19:04 UTCJul 25, 20:28 UTC1h 24m
2026-07-25 SWA4700 SNA → OAK Jul 25, 17:25 UTCJul 25, 18:10 UTC45m
2026-07-25 SWA2335 HOU → LGA Jul 25, 02:10 UTCJul 25, 03:25 UTC1h 15m
2026-07-25 SWA2434 LAS → OAK Jul 25, 00:40 UTCJul 25, 01:25 UTC45m
2026-07-24 SWA278 PHL → STL Jul 24, 22:30 UTCJul 24, 23:30 UTC1h 0m
2026-07-24 SWA4950 STL → MIA Jul 24, 20:25 UTCJul 24, 21:15 UTC50m
2026-07-24 SWA4950 STL → MIA Jul 24, 20:20 UTCJul 24, 21:09 UTC50m
2026-07-24 SWA4877 CMH → BWI Jul 24, 18:05 UTCJul 24, 18:55 UTC50m
2026-07-24 SWA4877 CMH → BWI Jul 24, 18:00 UTCJul 24, 18:52 UTC53m
2026-07-24 SWA3537 GRR → RSW Jul 24, 15:45 UTCJul 24, 16:45 UTC1h 0m
2026-07-24 SWA1227 ONT → OAK Jul 24, 05:00 UTCJul 24, 05:45 UTC45m
2026-07-24 SWA1227 ONT → OAK Jul 24, 02:25 UTCJul 24, 04:00 UTC1h 35m
2026-07-24 SWA3064 LAS → OAK Jul 24, 00:05 UTCJul 24, 01:25 UTC1h 20m
2026-07-23 SWA4237 SDF → TPA Jul 23, 21:30 UTCJul 23, 23:05 UTC1h 35m
2026-07-23 SWA1677 CVG → MCO Jul 23, 19:10 UTCJul 23, 20:20 UTC1h 10m
2026-07-23 SWA1677 CVG → MCO Jul 23, 16:55 UTCJul 23, 17:45 UTC50m
2026-07-23 SWA813 BOS → MDW Jul 23, 14:15 UTCJul 23, 15:25 UTC1h 10m
2026-07-23 SWA813 BOS → MDW Jul 23, 14:13 UTCJul 23, 15:21 UTC1h 8m
2026-07-23 SWA407 BOS → STL Jul 23, 03:50 UTCJul 23, 04:45 UTC55m
2026-07-23 SWA407 BOS → STL Jul 23, 03:45 UTCJul 23, 04:42 UTC57m
2026-07-23 SWA3603 SJC → EUG Jul 23, 01:50 UTCJul 23, 02:40 UTC50m
2026-07-23 SWA697 PDX → OAK Jul 23, 00:05 UTCJul 23, 00:55 UTC50m
2026-07-22 SWA3700 ORF → BWI Jul 22, 22:15 UTCJul 22, 23:15 UTC1h 0m
2026-07-22 SWA397 SJC → LAS Jul 22, 20:15 UTCJul 22, 21:25 UTC1h 10m
2026-07-22 SWA397 SJC → LAS Jul 22, 20:15 UTCJul 22, 21:18 UTC1h 3m
2026-07-22 SWA397 SJC → LAS Jul 22, 17:10 UTCJul 22, 19:10 UTC2h 0m
2026-07-22 SWA2752 OAK → SNA Jul 22, 14:05 UTCJul 22, 16:00 UTC1h 55m
2026-07-22 SWA2752 OAK → SNA Jul 22, 14:04 UTCJul 22, 15:58 UTC1h 55m
2026-07-22 SWA3057 PHX → AUS Jul 22, 02:36 UTCJul 22, 03:39 UTC1h 3m
2026-07-22 SWA3057 PHX → AUS Jul 22, 02:40 UTCJul 22, 03:45 UTC1h 5m
2026-07-22 SWA806 SFO → BUR Jul 22, 00:40 UTCJul 22, 01:30 UTC50m
2026-07-22 SWA806 SFO → BUR Jul 22, 00:40 UTCJul 22, 01:25 UTC45m
2026-07-21 SWA3248 PHX → BUR Jul 21, 22:50 UTCJul 21, 23:50 UTC1h 0m
2026-07-21 SWA3248 PHX → BUR Jul 21, 22:48 UTCJul 21, 23:49 UTC1h 1m
2026-07-21 SWA1450 - Jul 21, 20:55 UTCJul 21, 21:50 UTC55m
2026-07-21 SWA1450 MKE → DEN Jul 21, 20:51 UTCJul 21, 21:45 UTC54m
2026-07-21 SWA1450 SMF → ONT Jul 21, 18:55 UTCJul 21, 19:55 UTC1h 0m
2026-07-21 SWA1450 DEN → SMF Jul 21, 15:50 UTCJul 21, 17:45 UTC1h 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 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 Jul 26, 21:50 UTC.
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.