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 Jul 26, 20:30 UTC
Flights observed
744
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 20:30 UTC

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
SWA2433 - 5 2026-07-20
SWA2407 - 5 2026-07-03
SWA194 - 5 2026-07-02
SWA1473 - 5 2026-06-17
SWA845 Southwest Airlines 4 2026-07-25
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
SWA2621 Southwest Airlines 4 2026-07-25
SWA2542 - 4 2026-07-02
SWA2537 - 4 2026-07-21
SWA2451 Southwest Airlines 4 2026-05-20
SWA2431 - 4 2026-07-01

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SWA4209 MDW → IAH Jul 26, 19:50 UTCJul 26, 20:30 UTC40m
2026-07-26 SWA2716 MSP → MDW Jul 26, 17:40 UTCJul 26, 18:40 UTC1h 0m
2026-07-26 SWA2869 BDL → MDW Jul 26, 15:35 UTCJul 26, 16:40 UTC1h 5m
2026-07-26 SWA2869 BDL → MDW Jul 26, 15:32 UTCJul 26, 16:35 UTC1h 4m
2026-07-26 SWA163 PHX → SJC Jul 26, 12:00 UTCJul 26, 13:45 UTC1h 45m
2026-07-26 SWA858 DEN → FLL Jul 26, 02:45 UTCJul 26, 03:25 UTC40m
2026-07-25 SWA2621 BUR → OAK Jul 25, 23:40 UTCJul 26, 00:50 UTC1h 10m
2026-07-25 SWA2621 BUR → OAK Jul 25, 23:38 UTCJul 26, 00:47 UTC1h 9m
2026-07-25 SWA845 ISP → BWI Jul 25, 20:40 UTCJul 25, 22:35 UTC1h 55m
2026-07-25 SWA845 ISP → BWI Jul 25, 20:35 UTCJul 25, 22:33 UTC1h 58m
2026-07-25 SWA845 ISP → BWI Jul 25, 17:25 UTCJul 25, 19:20 UTC1h 55m
2026-07-25 SWA845 ISP → BWI Jul 25, 15:25 UTCJul 25, 16:20 UTC55m
2026-07-25 SWA3035 BUF → DEN Jul 25, 13:24 UTCJul 25, 14:14 UTC50m
2026-07-25 SWA3035 BUF → DEN Jul 25, 13:25 UTCJul 25, 14:20 UTC55m
2026-07-25 SWA312 SAN → OAK Jul 25, 03:55 UTCJul 25, 04:45 UTC50m
2026-07-25 SWA3714 BWI → DTW Jul 25, 02:05 UTCJul 25, 03:05 UTC1h 0m
2026-07-25 SWA4307 RSW → MKE Jul 25, 00:34 UTCJul 25, 01:25 UTC51m
2026-07-25 SWA4307 RSW → MKE Jul 25, 00:35 UTCJul 25, 01:25 UTC50m
2026-07-24 SWA2951 MCO → RDU Jul 24, 22:40 UTCJul 24, 23:42 UTC1h 2m
2026-07-24 SWA2951 MCO → RDU Jul 24, 20:15 UTCJul 24, 21:40 UTC1h 25m
2026-07-24 SWA2951 MCO → RDU Jul 24, 16:15 UTCJul 24, 19:15 UTC3h 0m
2026-07-24 SWA163 PHX → SJC Jul 24, 12:40 UTCJul 24, 14:20 UTC1h 40m
2026-07-24 SWA4248 BUF → MCO Jul 24, 00:25 UTCJul 24, 01:50 UTC1h 25m
2026-07-23 SWA2658 DTW → MDW Jul 23, 20:20 UTCJul 23, 21:15 UTC55m
2026-07-23 SWA2658 DTW → MDW Jul 23, 20:15 UTCJul 23, 22:38 UTC2h 23m
2026-07-23 SWA762 SAN → LAS Jul 23, 16:55 UTCJul 23, 19:00 UTC2h 5m
2026-07-23 SWA762 SAN → LAS Jul 23, 15:05 UTCJul 23, 15:50 UTC45m
2026-07-23 SWA4550 RDU → BWI Jul 23, 12:50 UTCJul 23, 13:30 UTC40m
2026-07-23 SWA161 SJC → BUR Jul 23, 01:55 UTCJul 23, 02:45 UTC50m
2026-07-23 SWA161 SJC → BUR Jul 23, 01:54 UTCJul 23, 02:48 UTC54m
2026-07-22 SWA1624 DAL → LGA Jul 22, 22:25 UTCJul 23, 00:35 UTC2h 10m
2026-07-22 SWA1624 DAL → LGA Jul 22, 17:40 UTCJul 22, 21:10 UTC3h 30m
2026-07-22 SWA1624 DAL → LGA Jul 22, 14:45 UTCJul 22, 16:40 UTC1h 55m
2026-07-22 SWA712 ALB → BWI Jul 22, 04:15 UTCJul 22, 05:25 UTC1h 10m
2026-07-22 SWA807 BUR → OAK Jul 22, 02:20 UTCJul 22, 03:05 UTC45m
2026-07-22 SWA807 BUR → OAK Jul 22, 02:15 UTCJul 22, 02:56 UTC41m
2026-07-22 SWA3768 BWI → TPA Jul 22, 00:25 UTCJul 22, 01:20 UTC55m
2026-07-22 SWA3768 BWI → TPA Jul 22, 00:21 UTCJul 22, 01:17 UTC56m
2026-07-21 SWA4552 SJC → DEN Jul 21, 22:20 UTCJul 21, 23:30 UTC1h 10m
2026-07-21 SWA2537 SMF → SAN Jul 21, 20:00 UTCJul 21, 21:10 UTC1h 10m
2026-07-21 SWA2537 SMF → SAN Jul 21, 19:57 UTCJul 21, 21:11 UTC1h 14m
2026-07-21 SWA695 - Jul 21, 17:35 UTCJul 21, 18:30 UTC55m
2026-07-21 SWA695 LAS → SMF Jul 21, 17:30 UTCJul 21, 18:29 UTC59m
2026-07-21 SWA695 - Jul 21, 15:40 UTCJul 21, 16:30 UTC50m
2026-07-21 SWA3210 MCO → BDL Jul 21, 03:00 UTCJul 21, 04:00 UTC1h 0m
2026-07-21 SWA3210 MCO → BDL Jul 21, 03:00 UTCJul 21, 04:01 UTC1h 1m
2026-07-21 SWA3210 MCO → BDL Jul 21, 00:40 UTCJul 21, 02:05 UTC1h 25m
2026-07-20 SWA2433 SJC → PDX Jul 20, 22:21 UTCJul 20, 23:39 UTC1h 19m
2026-07-20 SWA2433 SJC → PDX Jul 20, 22:25 UTCJul 20, 23:40 UTC1h 15m
2026-07-20 SWA2433 - Jul 20, 20:30 UTCJul 20, 21:20 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 Jul 26, 20:30 UTC.
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.