Apparatus

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sensors Mode-S transponder

A59F53

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N461WN · BOEING 737-700 · operated by SOUTHWEST AIRLINES CO

Hex
A59F53
Octal
51317523
Decimal
10,854,227
Country
US
Tail
N461WN
Type
B737
No current signal · last broadcast Jul 26, 22:45 UTC
Flights observed
708
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:45 UTC

Last known position

Most recent position reported by Mode-S A59F53.

Country allocation

The ICAO 24-bit address A59F53 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
SWA786 - 8 2026-06-26
SWA4128 Southwest Airlines 8 2026-05-12
SWA826 Southwest Airlines 6 2026-04-15
SWA2286 - 6 2026-06-27
SWA1540 - 6 2026-07-10
SWA4615 - 5 2026-06-30
SWA3555 - 5 2026-06-22
SWA3281 - 5 2026-06-23
SWA2569 Southwest Airlines 5 2026-06-15
SWA1171 Southwest Airlines 5 2026-06-09
SWA467 - 4 2026-07-13
SWA297 - 4 2026-07-03
SWA2748 - 4 2026-06-30
SWA2705 Southwest Airlines 4 2026-05-29
SWA2536 Southwest Airlines 4 2026-05-18
SWA2168 Southwest Airlines 4 2026-05-14
SWA1739 - 4 2026-06-25
SWA1677 - 4 2026-06-27
SWA1363 Southwest Airlines 4 2026-05-19
SWA908 Southwest Airlines 3 2026-07-22

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SWA989 ELP → AUS Jul 26, 21:55 UTCJul 26, 22:45 UTC50m
2026-07-26 SWA989 ELP → AUS Jul 26, 18:40 UTCJul 26, 20:50 UTC2h 10m
2026-07-26 SWA2387 OAK → BUR Jul 26, 15:00 UTCJul 26, 17:35 UTC2h 35m
2026-07-26 SWA2488 SFO → LAS Jul 26, 12:50 UTCJul 26, 14:00 UTC1h 10m
2026-07-25 SWA2291 SNA → SMF Jul 25, 22:05 UTCJul 26, 00:30 UTC2h 25m
2026-07-25 SWA2291 SNA → SMF Jul 25, 22:03 UTCJul 26, 00:31 UTC2h 28m
2026-07-25 SWA2062 SJC → MDW Jul 25, 16:40 UTCJul 25, 21:00 UTC4h 20m
2026-07-25 SWA2062 SJC → MDW Jul 25, 16:39 UTCJul 25, 20:55 UTC4h 16m
2026-07-25 SWA3489 HOU → LGA Jul 25, 14:15 UTCJul 25, 15:20 UTC1h 5m
2026-07-25 SWA3489 HOU → LGA Jul 25, 14:12 UTCJul 25, 15:16 UTC1h 5m
2026-07-25 SWA2435 PHX → SMF Jul 25, 04:55 UTCJul 25, 05:40 UTC45m
2026-07-25 SWA3645 LGB → OAK Jul 25, 03:00 UTCJul 25, 03:55 UTC55m
2026-07-25 SWA3645 LGB → OAK Jul 25, 02:56 UTCJul 25, 03:52 UTC56m
2026-07-25 SWA4181 OAK → PHX Jul 25, 00:05 UTCJul 25, 01:15 UTC1h 10m
2026-07-24 SWA897 ONT → SJC Jul 24, 22:05 UTCJul 24, 22:50 UTC45m
2026-07-24 SWA2984 SAN → LAS Jul 24, 18:20 UTCJul 24, 20:30 UTC2h 10m
2026-07-24 SWA2984 SAN → LAS Jul 24, 16:20 UTCJul 24, 17:20 UTC1h 0m
2026-07-24 SWA1781 - Jul 24, 12:45 UTCJul 24, 13:30 UTC45m
2026-07-24 SWA4200 DEN → DTW Jul 24, 01:10 UTCJul 24, 01:45 UTC35m
2026-07-23 SWA1999 PUJ → MDW Jul 23, 19:25 UTCJul 23, 23:25 UTC4h 0m
2026-07-23 SWA782 SFO → DEN Jul 23, 15:15 UTCJul 23, 15:55 UTC40m
2026-07-23 SWA782 SFO → DEN Jul 23, 15:14 UTCJul 23, 17:30 UTC2h 16m
2026-07-23 SWA617 BOI → PHX Jul 23, 13:00 UTCJul 23, 13:45 UTC45m
2026-07-22 SWA616 LAS → SFO Jul 22, 21:25 UTCJul 22, 22:05 UTC40m
2026-07-22 SWA908 SAN → OAK Jul 22, 17:50 UTCJul 22, 19:45 UTC1h 55m
2026-07-22 SWA908 SAN → OAK Jul 22, 17:49 UTCJul 22, 19:45 UTC1h 56m
2026-07-22 SWA908 SAN → OAK Jul 22, 15:45 UTCJul 22, 16:50 UTC1h 5m
2026-07-22 SWA2087 TPA → ALB Jul 22, 12:35 UTCJul 22, 14:15 UTC1h 40m
2026-07-22 SWA4624 PHX → SAT Jul 22, 00:35 UTCJul 22, 01:35 UTC1h 0m
2026-07-21 SWA2606 LGB → OAK Jul 21, 21:30 UTCJul 21, 23:00 UTC1h 30m
2026-07-21 SWA1432 - Jul 21, 17:40 UTCJul 21, 20:15 UTC2h 35m
2026-07-21 SWA1432 - Jul 21, 16:10 UTCJul 21, 16:45 UTC35m
2026-07-21 SWA3212 RSW → MDW Jul 21, 00:00 UTCJul 21, 03:00 UTC3h 0m
2026-07-20 SWA3212 RSW → MDW Jul 20, 21:40 UTCJul 20, 22:55 UTC1h 15m
2026-07-20 SWA3212 RSW → MDW Jul 20, 19:30 UTCJul 20, 20:45 UTC1h 15m
2026-07-20 SWA949 SMF → PDX Jul 20, 17:20 UTCJul 20, 18:30 UTC1h 10m
2026-07-20 SWA4218 DAL → SMF Jul 20, 12:50 UTCJul 20, 15:45 UTC2h 55m
2026-07-20 SWA3109 STL → BWI Jul 20, 10:55 UTCJul 20, 11:30 UTC35m
2026-07-20 SWA175 DEN → OKC Jul 20, 01:23 UTCJul 20, 02:38 UTC1h 15m
2026-07-19 SWA1133 SNA → SJC Jul 19, 23:40 UTCJul 20, 00:20 UTC40m
2026-07-19 SWA1280 - Jul 19, 18:50 UTCJul 19, 20:45 UTC1h 55m
2026-07-19 SWA1280 BNA → BZN Jul 19, 18:48 UTCJul 19, 21:50 UTC3h 2m
2026-07-19 SWA1354 CVG → MCO Jul 19, 16:45 UTCJul 19, 17:50 UTC1h 5m
2026-07-19 SWA1354 CVG → MCO Jul 19, 13:55 UTCJul 19, 15:30 UTC1h 35m
2026-07-19 SWA1787 MDW → BOS Jul 19, 10:45 UTCJul 19, 12:25 UTC1h 40m
2026-07-19 SWA3573 - Jul 19, 00:10 UTCJul 19, 00:45 UTC35m
2026-07-19 SWA3573 STL → ECP Jul 19, 00:07 UTCJul 19, 01:35 UTC1h 28m
2026-07-18 SWA1879 - Jul 18, 21:50 UTCJul 18, 23:15 UTC1h 25m
2026-07-18 SWA1879 VPS → STL Jul 18, 21:48 UTCJul 18, 23:14 UTC1h 26m
2026-07-18 SWA1129 - Jul 18, 18:50 UTCJul 18, 20:40 UTC1h 50m

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 N461WN page for operator, model, and routing details .

Mode-S A59F53 frequently asked

What is Mode-S code A59F53?
A59F53 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N461WN.
Where is Mode-S A59F53 registered?
Mode-S code A59F53 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 A59F53 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:45 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A59F53, octal 51317523, decimal 10,854,227.
What flights does A59F53 operate?
Mode-S A59F53 has broadcast 20 distinct callsigns, including SWA786, SWA4128, SWA826, SWA2286, SWA1540.