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sensors Mode-S transponder

AD5817

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N959WN · BOEING 737-700 · operated by SOUTHWEST AIRLINES CO

Hex
AD5817
Octal
53254027
Decimal
11,360,279
Country
US
Tail
N959WN
Type
B737
Broadcasting now · callsign SWA1419 · 36,000 ft
Flights observed
707
Distinct callsigns
20
Country
US
Last broadcast
1h ago

Current position

AD5817 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address AD5817 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
SWA3968 Southwest Airlines 10 2026-04-24
SWA853 Southwest Airlines 6 2026-06-07
SWA270 - 6 2026-07-11
SWA1198 - 6 2026-07-12
SWA775 Southwest Airlines 5 2026-05-29
SWA3743 - 5 2026-07-03
SWA2157 Southwest Airlines 5 2026-05-10
SWA2072 Southwest Airlines 5 2026-04-19
SWA154 Southwest Airlines 5 2026-05-12
SWA4489 Southwest Airlines 4 2026-05-07
SWA3601 Southwest Airlines 4 2026-06-06
SWA3584 Southwest Airlines 4 2026-04-25
SWA3168 Southwest Airlines 4 2026-06-08
SWA2098 - 4 2026-06-21
SWA1838 Southwest Airlines 4 2026-05-24
SWA1306 Southwest Airlines 4 2026-04-15
SWA1268 - 4 2026-06-29
SWA962 - 3 2026-06-25
SWA845 Southwest Airlines 3 2026-06-09
SWA826 Southwest Airlines 3 2026-04-17

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 SWA176 BWI → MCO Jul 13, 22:50 UTCJul 14, 00:50 UTC2h 0m
2026-07-13 SWA2664 - Jul 13, 16:35 UTCJul 13, 19:35 UTC3h 0m
2026-07-13 SWA2664 - Jul 13, 13:55 UTCJul 13, 15:35 UTC1h 40m
2026-07-13 SWA2991 MSY → DEN Jul 13, 10:30 UTCJul 13, 12:55 UTC2h 25m
2026-07-13 SWA185 - Jul 13, 06:15 UTCJul 13, 07:01 UTC45m
2026-07-13 SWA49 - Jul 13, 04:05 UTCJul 13, 05:05 UTC1h 0m
2026-07-13 SWA1496 AUS → DAL Jul 13, 01:40 UTCJul 13, 02:40 UTC1h 0m
2026-07-12 SWA1496 MCO → AUS Jul 12, 20:50 UTCJul 13, 00:15 UTC3h 25m
2026-07-12 SWA1198 - Jul 12, 16:05 UTCJul 12, 18:05 UTC2h 0m
2026-07-12 SWA1198 CMH → MCO Jul 12, 16:05 UTCJul 12, 17:59 UTC1h 55m
2026-07-12 SWA1198 - Jul 12, 13:05 UTCJul 12, 15:05 UTC2h 0m
2026-07-11 SWA270 DCA → DAL Jul 11, 21:10 UTCJul 11, 23:55 UTC2h 45m
2026-07-11 SWA270 - Jul 11, 19:00 UTCJul 11, 20:00 UTC1h 0m
2026-07-11 SWA270 AUS → CMH Jul 11, 15:05 UTCJul 11, 17:30 UTC2h 25m
2026-07-11 SWA270 - Jul 11, 12:35 UTCJul 11, 14:00 UTC1h 25m
2026-07-11 SWA2177 LAS → ABQ Jul 11, 05:10 UTCJul 11, 06:20 UTC1h 10m
2026-07-11 SWA2177 LAS → ABQ Jul 11, 05:10 UTCJul 11, 06:16 UTC1h 6m
2026-07-11 SWA2177 - Jul 11, 03:25 UTCJul 11, 04:20 UTC55m
2026-07-11 SWA2012 - Jul 11, 01:45 UTCJul 11, 02:30 UTC45m
2026-07-10 SWA2012 - Jul 10, 23:05 UTCJul 11, 00:45 UTC1h 40m
2026-07-10 SWA2012 - Jul 10, 21:05 UTCJul 10, 22:10 UTC1h 5m
2026-07-10 SWA2824 - Jul 10, 17:50 UTCJul 10, 19:15 UTC1h 25m
2026-07-10 SWA2824 MEM → HOU Jul 10, 17:45 UTCJul 10, 18:57 UTC1h 12m
2026-07-10 SWA2824 - Jul 10, 15:30 UTCJul 10, 16:40 UTC1h 10m
2026-07-10 SWA3609 - Jul 10, 12:55 UTCJul 10, 13:45 UTC50m
2026-07-10 SWA671 - Jul 10, 02:15 UTCJul 10, 02:50 UTC35m
2026-07-09 SWA261 AUS → BNA Jul 9, 23:05 UTCJul 10, 00:50 UTC1h 45m
2026-07-09 SWA345 - Jul 9, 19:10 UTCJul 9, 21:40 UTC2h 30m
2026-07-09 SWA3626 - Jul 9, 16:30 UTCJul 9, 17:30 UTC1h 0m
2026-07-09 SWA3626 SEA → SJC Jul 9, 13:55 UTCJul 9, 15:35 UTC1h 40m
2026-07-09 SWA4144 MDW → SEA Jul 9, 03:20 UTCJul 9, 07:15 UTC3h 55m
2026-07-09 SWA1200 - Jul 9, 00:00 UTCJul 9, 00:50 UTC50m
2026-07-08 SWA4355 - Jul 8, 22:00 UTCJul 8, 22:55 UTC55m
2026-07-08 SWA4355 - Jul 8, 18:45 UTCJul 8, 20:45 UTC2h 0m
2026-07-08 SWA4355 - Jul 8, 15:40 UTCJul 8, 17:40 UTC2h 0m
2026-07-08 SWA4456 - Jul 8, 12:20 UTCJul 8, 14:00 UTC1h 40m
2026-07-08 SWA3514 - Jul 8, 01:25 UTCJul 8, 03:30 UTC2h 5m
2026-07-07 SWA3515 - Jul 7, 23:00 UTCJul 8, 00:10 UTC1h 10m
2026-07-07 SWA856 - Jul 7, 19:10 UTCJul 7, 20:55 UTC1h 45m
2026-07-07 SWA2757 - Jul 7, 17:05 UTCJul 7, 18:10 UTC1h 5m
2026-07-07 SWA1052 - Jul 7, 15:25 UTCJul 7, 16:00 UTC35m
2026-07-07 SWA1052 BWI → PIT Jul 7, 15:24 UTCJul 7, 16:00 UTC36m
2026-07-07 SWA1052 DEN → BWI Jul 7, 11:15 UTCJul 7, 14:20 UTC3h 5m
2026-07-07 SWA4214 - Jul 7, 00:40 UTCJul 7, 04:00 UTC3h 20m
2026-07-06 SWA3414 - Jul 6, 22:05 UTCJul 6, 23:20 UTC1h 15m
2026-07-06 SWA297 - Jul 6, 19:45 UTCJul 6, 20:50 UTC1h 5m
2026-07-06 SWA1094 - Jul 6, 17:20 UTCJul 6, 18:20 UTC1h 0m
2026-07-06 SWA3529 - Jul 6, 15:15 UTCJul 6, 16:10 UTC55m
2026-07-06 SWA3351 DAL → DCA Jul 6, 11:25 UTCJul 6, 14:00 UTC2h 35m
2026-07-06 SWA4128 PHX → SFO Jul 6, 03:10 UTCJul 6, 05:50 UTC2h 40m

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 N959WN page for operator, model, and routing details .

Mode-S AD5817 frequently asked

What is Mode-S code AD5817?
AD5817 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N959WN.
Where is Mode-S AD5817 registered?
Mode-S code AD5817 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 AD5817 broadcasting right now?
Yes. Mode-S AD5817 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AD5817, octal 53254027, decimal 11,360,279.
What flights does AD5817 operate?
Mode-S AD5817 has broadcast 20 distinct callsigns, including SWA3968, SWA853, SWA270, SWA1198, SWA775.