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sensors Mode-S transponder

AD50A9

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N957WN · BOEING 737-700 · operated by SOUTHWEST AIRLINES CO

Hex
AD50A9
Octal
53250251
Decimal
11,358,377
Country
US
Tail
N957WN
Type
B737
Broadcasting now · callsign SWA671 · 19,000 ft
Flights observed
696
Distinct callsigns
20
Country
US
Last broadcast
1h ago

Current position

AD50A9 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address AD50A9 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
SWA882 - 7 2026-07-07
SWA169 Southwest Airlines 6 2026-05-16
SWA8 Southwest Airlines 5 2026-04-18
SWA4140 Southwest Airlines 4 2026-05-26
SWA3225 - 4 2026-04-17
SWA2753 Southwest Airlines 4 2026-06-13
SWA2720 Southwest Airlines 4 2026-05-02
SWA2673 - 4 2026-07-06
SWA2278 Southwest Airlines 4 2026-05-05
SWA188 Southwest Airlines 4 2026-05-11
SWA1793 - 4 2026-04-14
SWA165 - 4 2026-06-15
SWA1507 - 4 2026-04-13
SWA1432 - 4 2026-07-13
SWA1297 Southwest Airlines 4 2026-06-15
SWA1275 Southwest Airlines 4 2026-04-15
SWA1250 - 4 2026-06-22
SWA106 - 4 2026-04-13
SWA969 - 3 2026-06-21
SWA931 - 3 2026-06-18

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 SWA261 AUS → BNA Jul 14, 00:20 UTCJul 14, 02:05 UTC1h 45m
2026-07-13 SWA2110 - Jul 13, 21:05 UTCJul 13, 23:05 UTC2h 0m
2026-07-13 SWA2110 IND → AUS Jul 13, 21:03 UTCJul 13, 23:00 UTC1h 57m
2026-07-13 SWA1432 - Jul 13, 18:45 UTCJul 13, 19:55 UTC1h 10m
2026-07-13 SWA1432 - Jul 13, 16:10 UTCJul 13, 17:45 UTC1h 35m
2026-07-13 SWA1432 - Jul 13, 14:40 UTCJul 13, 15:15 UTC35m
2026-07-13 SWA1432 - Jul 13, 10:25 UTCJul 13, 13:20 UTC2h 55m
2026-07-13 SWA2627 MCO → DCA Jul 13, 02:01 UTCJul 13, 03:50 UTC1h 50m
2026-07-13 SWA2627 MCO → DCA Jul 13, 02:00 UTCJul 13, 03:48 UTC1h 49m
2026-07-12 SWA4833 DCA → MCO Jul 12, 22:31 UTCJul 13, 00:31 UTC2h 0m
2026-07-12 SWA4833 DCA → MCO Jul 12, 22:35 UTCJul 13, 00:40 UTC2h 5m
2026-07-12 SWA3502 - Jul 12, 19:30 UTCJul 12, 20:15 UTC45m
2026-07-12 SWA3502 CMH → DCA Jul 12, 19:29 UTCJul 12, 20:21 UTC52m
2026-07-12 SWA3502 TPA → CMH Jul 12, 15:55 UTCJul 12, 17:50 UTC1h 55m
2026-07-12 SWA2088 - Jul 12, 12:55 UTCJul 12, 14:50 UTC1h 55m
2026-07-12 SWA1227 - Jul 12, 11:15 UTCJul 12, 11:45 UTC30m
2026-07-12 SWA1227 CRP → HOU Jul 12, 11:11 UTCJul 12, 11:46 UTC35m
2026-07-12 SWA4217 - Jul 12, 02:40 UTCJul 12, 03:10 UTC30m
2026-07-12 SWA2726 - Jul 12, 00:05 UTCJul 12, 01:20 UTC1h 15m
2026-07-12 SWA2726 VPS → HOU Jul 12, 00:01 UTCJul 12, 01:14 UTC1h 13m
2026-07-11 SWA1421 - Jul 11, 21:35 UTCJul 11, 23:00 UTC1h 25m
2026-07-11 SWA1356 - Jul 11, 19:35 UTCJul 11, 20:25 UTC50m
2026-07-11 SWA3940 - Jul 11, 17:40 UTCJul 11, 18:40 UTC1h 0m
2026-07-11 SWA3254 PHX → DAL Jul 11, 14:10 UTCJul 11, 16:11 UTC2h 1m
2026-07-11 SWA3254 PHX → DAL Jul 11, 14:10 UTCJul 11, 16:15 UTC2h 5m
2026-07-11 SWA2578 - Jul 11, 11:00 UTCJul 11, 13:15 UTC2h 15m
2026-07-11 SWA9009 - Jul 11, 05:15 UTCJul 11, 07:45 UTC2h 30m
2026-07-11 SWA4294 RSW → BWI Jul 11, 01:15 UTCJul 11, 03:20 UTC2h 5m
2026-07-10 SWA4569 - Jul 10, 22:00 UTCJul 11, 00:15 UTC2h 15m
2026-07-10 SWA1345 - Jul 10, 17:55 UTCJul 10, 19:35 UTC1h 40m
2026-07-10 SWA1345 BNA → BWI Jul 10, 17:54 UTCJul 10, 19:18 UTC1h 24m
2026-07-10 SWA1426 DCA → BNA Jul 10, 15:10 UTCJul 10, 16:45 UTC1h 35m
2026-07-10 SWA1426 - Jul 10, 12:50 UTCJul 10, 13:55 UTC1h 5m
2026-07-09 SWA4165 - Jul 9, 23:30 UTCJul 10, 01:15 UTC1h 45m
2026-07-09 SWA3123 OKC → MDW Jul 9, 21:00 UTCJul 9, 22:35 UTC1h 35m
2026-07-09 SWA3309 PHX → OKC Jul 9, 18:05 UTCJul 9, 19:55 UTC1h 50m
2026-07-09 SWA3834 - Jul 9, 03:15 UTCJul 9, 04:05 UTC50m
2026-07-09 SWA3834 SMF → SNA Jul 9, 01:10 UTCJul 9, 02:20 UTC1h 10m
2026-07-08 SWA4464 - Jul 8, 23:10 UTCJul 9, 00:20 UTC1h 10m
2026-07-08 SWA3076 - Jul 8, 21:00 UTCJul 8, 22:10 UTC1h 10m
2026-07-08 SWA2748 - Jul 8, 18:45 UTCJul 8, 19:35 UTC50m
2026-07-08 SWA3037 OAK → BUR Jul 8, 17:00 UTCJul 8, 17:50 UTC50m
2026-07-08 SWA4919 BUR → OAK Jul 8, 14:35 UTCJul 8, 15:30 UTC55m
2026-07-08 SWA557 AUS → BUR Jul 8, 02:45 UTCJul 8, 05:30 UTC2h 45m
2026-07-07 SWA882 - Jul 7, 23:45 UTCJul 8, 01:05 UTC1h 20m
2026-07-07 SWA882 PHX → ABQ Jul 7, 21:45 UTCJul 7, 22:40 UTC55m
2026-07-07 SWA1201 - Jul 7, 20:05 UTCJul 7, 20:35 UTC30m
2026-07-07 SWA1201 - Jul 7, 17:10 UTCJul 7, 18:10 UTC1h 0m
2026-07-07 SWA4125 SBA → DEN Jul 7, 13:30 UTCJul 7, 15:25 UTC1h 55m
2026-07-07 SWA3842 DEN → SBA Jul 7, 03:40 UTCJul 7, 05:40 UTC2h 0m

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 N957WN page for operator, model, and routing details .

Mode-S AD50A9 frequently asked

What is Mode-S code AD50A9?
AD50A9 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N957WN.
Where is Mode-S AD50A9 registered?
Mode-S code AD50A9 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 AD50A9 broadcasting right now?
Yes. Mode-S AD50A9 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AD50A9, octal 53250251, decimal 11,358,377.
What flights does AD50A9 operate?
Mode-S AD50A9 has broadcast 20 distinct callsigns, including SWA882, SWA169, SWA8, SWA4140, SWA3225.