Apparatus

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sensors Mode-S transponder

A73F35

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N566WN · BOEING 737-700 · operated by SOUTHWEST AIRLINES CO

Hex
A73F35
Octal
51637465
Decimal
10,960,693
Country
US
Tail
N566WN
Type
B737
No current signal · last broadcast 3h ago
Flights observed
657
Distinct callsigns
20
Country
US
Last broadcast
3h ago

Last known position

Most recent position reported by Mode-S A73F35.

Country allocation

The ICAO 24-bit address A73F35 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
SWA4272 Southwest Airlines 8 2026-05-21
SWA3014 - 8 2026-06-29
SWA1594 - 6 2026-06-17
SWA962 Southwest Airlines 5 2026-06-04
SWA853 Southwest Airlines 5 2026-05-13
SWA2407 - 5 2026-07-03
SWA194 - 5 2026-07-02
SWA1473 - 5 2026-06-17
SWA482 Southwest Airlines 4 2026-06-17
SWA4524 Southwest Airlines 4 2026-06-07
SWA3472 Southwest Airlines 4 2026-05-04
SWA3419 Southwest Airlines 4 2026-05-30
SWA284 - 4 2026-07-08
SWA2542 - 4 2026-07-02
SWA2451 Southwest Airlines 4 2026-05-20
SWA2431 - 4 2026-07-01
SWA2146 Southwest Airlines 4 2026-06-01
SWA1982 Southwest Airlines 4 2026-05-02
SWA1853 Southwest Airlines 4 2026-04-18
SWA170 Southwest Airlines 4 2026-06-06

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-15 SWA793 - Jul 15, 01:15 UTCJul 15, 01:55 UTC40m
2026-07-15 SWA793 BWI → RDU Jul 15, 01:10 UTCJul 15, 01:53 UTC43m
2026-07-14 SWA889 - Jul 14, 22:25 UTCJul 15, 00:10 UTC1h 44m
2026-07-14 SWA1339 DEN → MCO Jul 14, 16:45 UTCJul 14, 20:10 UTC3h 25m
2026-07-14 SWA698 BOI → DEN Jul 14, 13:55 UTCJul 14, 15:25 UTC1h 30m
2026-07-14 SWA644 - Jul 14, 04:15 UTCJul 14, 05:50 UTC1h 35m
2026-07-14 SWA3077 OAK → SAN Jul 14, 02:10 UTCJul 14, 03:20 UTC1h 10m
2026-07-13 SWA4842 - Jul 13, 23:55 UTCJul 14, 00:55 UTC1h 0m
2026-07-13 SWA4842 SAN → OAK Jul 13, 23:55 UTCJul 14, 00:54 UTC59m
2026-07-13 SWA1887 GEG → SAN Jul 13, 20:00 UTCJul 13, 22:35 UTC2h 35m
2026-07-13 SWA2491 - Jul 13, 17:00 UTCJul 13, 19:05 UTC2h 5m
2026-07-13 SWA2491 LGB → PHX Jul 13, 15:00 UTCJul 13, 16:00 UTC1h 0m
2026-07-13 SWA4907 SJC → LGB Jul 13, 02:10 UTCJul 13, 03:10 UTC1h 0m
2026-07-12 SWA4907 EUG → SJC Jul 12, 23:55 UTCJul 13, 01:20 UTC1h 25m
2026-07-12 SWA2909 - Jul 12, 22:05 UTCJul 12, 23:05 UTC1h 0m
2026-07-12 SWA4887 PDX → SJC Jul 12, 19:30 UTCJul 12, 21:10 UTC1h 40m
2026-07-12 SWA949 - Jul 12, 17:30 UTCJul 12, 18:35 UTC1h 5m
2026-07-12 SWA949 BUR → SMF Jul 12, 15:40 UTCJul 12, 16:30 UTC50m
2026-07-12 SWA4843 SJC → BUR Jul 12, 13:40 UTCJul 12, 14:31 UTC51m
2026-07-12 SWA4843 SJC → BUR Jul 12, 13:40 UTCJul 12, 14:35 UTC55m
2026-07-12 SWA1029 LGB → SJC Jul 12, 01:50 UTCJul 12, 02:40 UTC50m
2026-07-12 SWA1029 LGB → SJC Jul 12, 01:50 UTCJul 12, 02:36 UTC46m
2026-07-11 SWA1029 AUS → LGB Jul 11, 22:35 UTCJul 12, 01:05 UTC2h 30m
2026-07-11 SWA1029 DAL → AUS Jul 11, 21:00 UTCJul 11, 21:35 UTC35m
2026-07-10 SWA1577 - Jul 10, 22:40 UTCJul 11, 01:55 UTC3h 15m
2026-07-10 SWA1577 - Jul 10, 20:25 UTCJul 10, 21:35 UTC1h 10m
2026-07-10 SWA1577 - Jul 10, 17:05 UTCJul 10, 19:15 UTC2h 10m
2026-07-10 SWA1577 - Jul 10, 14:10 UTCJul 10, 15:55 UTC1h 45m
2026-07-10 SWA3498 - Jul 10, 04:50 UTCJul 10, 13:20 UTC8h 30m
2026-07-10 SWA1288 LAS → SAN Jul 10, 03:15 UTCJul 10, 04:00 UTC45m
2026-07-10 SWA1288 LAS → SAN Jul 10, 03:15 UTCJul 10, 04:05 UTC50m
2026-07-10 SWA1288 SFO → LAS Jul 10, 00:45 UTCJul 10, 02:00 UTC1h 15m
2026-07-09 SWA2272 DEN → BNA Jul 9, 22:20 UTCJul 9, 23:25 UTC1h 5m
2026-07-09 SWA2272 DEN → BNA Jul 9, 22:19 UTCJul 9, 23:23 UTC1h 4m
2026-07-09 SWA2272 DEN → BNA Jul 9, 18:45 UTCJul 9, 19:30 UTC45m
2026-07-09 SWA2327 STL → LAS Jul 9, 14:35 UTCJul 9, 17:40 UTC3h 5m
2026-07-09 SWA2327 - Jul 9, 12:35 UTCJul 9, 13:25 UTC50m
2026-07-09 SWA4519 - Jul 9, 03:40 UTCJul 9, 04:50 UTC1h 10m
2026-07-09 SWA3548 - Jul 9, 00:15 UTCJul 9, 02:05 UTC1h 50m
2026-07-09 SWA3548 BWI → BNA Jul 9, 00:12 UTCJul 9, 01:50 UTC1h 38m
2026-07-08 SWA554 - Jul 8, 21:25 UTCJul 8, 22:45 UTC1h 20m
2026-07-08 SWA284 DEN → MDW Jul 8, 18:10 UTCJul 8, 20:00 UTC1h 50m
2026-07-08 SWA284 ABQ → DEN Jul 8, 16:10 UTCJul 8, 17:00 UTC50m
2026-07-08 SWA2108 AUS → ABQ Jul 8, 13:35 UTCJul 8, 15:00 UTC1h 25m
2026-07-08 SWA2108 IND → AUS Jul 8, 10:35 UTCJul 8, 12:30 UTC1h 55m
2026-07-08 SWA3370 - Jul 8, 01:40 UTCJul 8, 02:55 UTC1h 15m
2026-07-08 SWA3370 BWI → IND Jul 8, 01:36 UTCJul 8, 02:54 UTC1h 18m
2026-07-07 SWA467 - Jul 7, 22:55 UTCJul 8, 00:15 UTC1h 20m
2026-07-07 SWA3895 - Jul 7, 19:15 UTCJul 7, 21:30 UTC2h 15m
2026-07-07 SWA4287 - Jul 7, 17:15 UTCJul 7, 18:05 UTC50m

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 N566WN page for operator, model, and routing details .

Mode-S A73F35 frequently asked

What is Mode-S code A73F35?
A73F35 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N566WN.
Where is Mode-S A73F35 registered?
Mode-S code A73F35 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 A73F35 broadcasting right now?
No active broadcast right now. Last signal was 3h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A73F35, octal 51637465, decimal 10,960,693.
What flights does A73F35 operate?
Mode-S A73F35 has broadcast 20 distinct callsigns, including SWA4272, SWA3014, SWA1594, SWA962, SWA853.