Apparatus

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sensors Mode-S transponder

A591D5

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N458WN · BOEING 737-700 · operated by SOUTHWEST AIRLINES CO

Hex
A591D5
Octal
51310725
Decimal
10,850,773
Country
US
Tail
N458WN
Type
B737
No current signal · last broadcast 32m ago
Flights observed
719
Distinct callsigns
20
Country
US
Last broadcast
32m ago

Last known position

Most recent position reported by Mode-S A591D5.

Country allocation

The ICAO 24-bit address A591D5 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
SWA4007 Southwest Airlines 7 2026-05-07
SWA910 - 6 2026-06-26
SWA427 - 6 2026-07-05
SWA2970 Southwest Airlines 6 2026-05-24
SWA670 - 5 2026-06-30
SWA487 Southwest Airlines 5 2026-06-26
SWA2699 Southwest Airlines 5 2026-04-17
SWA223 - 5 2026-04-13
SWA1363 - 5 2026-04-13
SWA576 Southwest Airlines 4 2026-05-18
SWA4752 - 4 2026-06-25
SWA4675 Southwest Airlines 4 2026-04-29
SWA4650 Southwest Airlines 4 2026-04-22
SWA4264 Southwest Airlines 4 2026-05-09
SWA4102 - 4 2026-07-11
SWA369 Southwest Airlines 4 2026-06-01
SWA3054 Southwest Airlines 4 2026-05-04
SWA2764 Southwest Airlines 4 2026-05-12
SWA2743 Southwest Airlines 4 2026-05-17
SWA2678 - 4 2026-06-27

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 SWA4769 - Jul 14, 21:15 UTCJul 14, 23:15 UTC1h 59m
2026-07-14 SWA4290 - Jul 14, 18:45 UTCJul 14, 20:00 UTC1h 15m
2026-07-14 SWA2855 LAS → SMF Jul 14, 16:40 UTCJul 14, 17:45 UTC1h 5m
2026-07-14 SWA2865 TPA → LAS Jul 14, 11:20 UTCJul 14, 15:20 UTC4h 0m
2026-07-14 SWA2173 BNA → TPA Jul 14, 02:40 UTCJul 14, 04:10 UTC1h 30m
2026-07-14 SWA2173 BNA → TPA Jul 14, 02:41 UTCJul 14, 04:06 UTC1h 25m
2026-07-14 SWA482 STL → BNA Jul 14, 00:20 UTCJul 14, 01:05 UTC45m
2026-07-13 SWA1094 SAV → STL Jul 13, 21:30 UTCJul 13, 23:20 UTC1h 50m
2026-07-13 SWA1094 - Jul 13, 19:15 UTCJul 13, 20:30 UTC1h 15m
2026-07-13 SWA1094 - Jul 13, 17:15 UTCJul 13, 18:15 UTC1h 0m
2026-07-13 SWA3529 - Jul 13, 15:10 UTCJul 13, 16:10 UTC1h 0m
2026-07-13 SWA3351 DAL → DCA Jul 13, 11:45 UTCJul 13, 14:10 UTC2h 25m
2026-07-13 SWA58 - Jul 13, 06:05 UTCJul 13, 07:20 UTC1h 15m
2026-07-13 SWA2679 - Jul 13, 03:50 UTCJul 13, 05:01 UTC1h 10m
2026-07-13 SWA2679 - Jul 13, 00:40 UTCJul 13, 02:50 UTC2h 10m
2026-07-12 SWA1642 RSW → MCO Jul 12, 20:30 UTCJul 12, 21:10 UTC40m
2026-07-12 SWA1642 - Jul 12, 17:20 UTCJul 12, 19:40 UTC2h 20m
2026-07-12 SWA1642 DEN → MSY Jul 12, 14:05 UTCJul 12, 16:20 UTC2h 15m
2026-07-12 SWA714 SLC → DEN Jul 12, 03:44 UTCJul 12, 04:43 UTC59m
2026-07-12 SWA714 PHX → SLC Jul 12, 01:50 UTCJul 12, 02:55 UTC1h 5m
2026-07-11 SWA4102 - Jul 11, 23:00 UTCJul 11, 23:15 UTC15m
2026-07-11 SWA4102 DAL → PHX Jul 11, 22:55 UTCJul 12, 00:50 UTC1h 55m
2026-07-11 SWA488 BNA → DAL Jul 11, 20:30 UTCJul 11, 22:01 UTC1h 30m
2026-07-11 SWA2588 - Jul 11, 18:30 UTCJul 11, 19:15 UTC45m
2026-07-11 SWA2588 JAN → BNA Jul 11, 18:16 UTCJul 11, 19:11 UTC55m
2026-07-11 SWA2588 - Jul 11, 16:10 UTCJul 11, 17:00 UTC50m
2026-07-11 SWA1849 - Jul 11, 13:25 UTCJul 11, 14:00 UTC35m
2026-07-11 SWA4451 HOU → SAT Jul 11, 03:58 UTCJul 11, 04:37 UTC39m
2026-07-11 SWA540 - Jul 11, 02:00 UTCJul 11, 02:45 UTC45m
2026-07-11 SWA540 - Jul 11, 00:20 UTCJul 11, 00:50 UTC30m
2026-07-10 SWA4301 - Jul 10, 22:20 UTCJul 10, 23:10 UTC50m
2026-07-10 SWA4301 LIT → BNA Jul 10, 22:13 UTCJul 10, 23:01 UTC48m
2026-07-10 SWA4301 - Jul 10, 20:15 UTCJul 10, 20:50 UTC35m
2026-07-10 SWA4328 - Jul 10, 17:30 UTCJul 10, 18:50 UTC1h 20m
2026-07-10 SWA434 - Jul 10, 16:00 UTCJul 10, 16:35 UTC35m
2026-07-10 SWA434 BNA → BHM Jul 10, 16:00 UTCJul 10, 16:31 UTC31m
2026-07-10 SWA434 - Jul 10, 13:30 UTCJul 10, 15:00 UTC1h 30m
2026-07-10 SWA1353 - Jul 10, 11:45 UTCJul 10, 12:30 UTC45m
2026-07-10 SWA1353 SAT → DAL Jul 10, 11:40 UTCJul 10, 12:28 UTC48m
2026-07-10 SWA2073 DEN → SAT Jul 10, 03:54 UTCJul 10, 05:36 UTC1h 42m
2026-07-10 SWA2073 - Jul 10, 03:55 UTCJul 10, 05:40 UTC1h 45m
2026-07-10 SWA1709 - Jul 10, 00:30 UTCJul 10, 02:40 UTC2h 10m
2026-07-09 SWA1658 - Jul 9, 22:05 UTCJul 9, 23:25 UTC1h 20m
2026-07-09 SWA1658 - Jul 9, 18:25 UTCJul 9, 20:50 UTC2h 25m
2026-07-09 SWA4092 - Jul 9, 15:10 UTCJul 9, 17:25 UTC2h 15m
2026-07-09 SWA2062 - Jul 9, 11:30 UTCJul 9, 13:40 UTC2h 10m
2026-07-09 SWA2062 HOU → PHX Jul 9, 11:29 UTCJul 9, 13:41 UTC2h 13m
2026-07-09 SWA59 - Jul 9, 02:55 UTCJul 9, 03:40 UTC45m
2026-07-08 SWA1583 - Jul 8, 23:15 UTCJul 9, 00:15 UTC1h 0m
2026-07-08 SWA2123 - Jul 8, 19:35 UTCJul 8, 21:50 UTC2h 15m

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 N458WN page for operator, model, and routing details .

Mode-S A591D5 frequently asked

What is Mode-S code A591D5?
A591D5 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N458WN.
Where is Mode-S A591D5 registered?
Mode-S code A591D5 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 A591D5 broadcasting right now?
No active broadcast right now. Last signal was 32m ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A591D5, octal 51310725, decimal 10,850,773.
What flights does A591D5 operate?
Mode-S A591D5 has broadcast 20 distinct callsigns, including SWA4007, SWA910, SWA427, SWA2970, SWA670.