Apparatus

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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
No current signal · last broadcast Jul 26, 21:45 UTC
Flights observed
802
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:45 UTC

Last known position

Most recent position reported by Mode-S AD5817.

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
SWA800 Southwest Airlines 6 2026-07-26
SWA270 - 6 2026-07-11
SWA1198 - 6 2026-07-12
SWA775 Southwest Airlines 5 2026-05-29
SWA4076 Southwest Airlines 5 2026-07-24
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
SWA3140 Southwest Airlines 4 2026-07-24
SWA2098 - 4 2026-06-21
SWA1838 Southwest Airlines 4 2026-05-24
SWA1306 Southwest Airlines 4 2026-04-15
SWA1268 - 4 2026-06-29

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SWA3062 LGB → OAK Jul 26, 19:05 UTCJul 26, 21:00 UTC1h 55m
2026-07-26 SWA3062 LGB → OAK Jul 26, 17:05 UTCJul 26, 18:05 UTC1h 0m
2026-07-26 SWA802 PHX → OAK Jul 26, 15:15 UTCJul 26, 16:05 UTC50m
2026-07-26 SWA800 MDW → PIT Jul 26, 00:00 UTCJul 26, 02:35 UTC2h 35m
2026-07-25 SWA800 MDW → PIT Jul 25, 23:59 UTCJul 26, 02:34 UTC2h 35m
2026-07-25 SWA800 MDW → PIT Jul 25, 20:50 UTCJul 25, 22:50 UTC2h 0m
2026-07-25 SWA800 MDW → PIT Jul 25, 18:15 UTCJul 25, 19:45 UTC1h 30m
2026-07-25 SWA800 MDW → PIT Jul 25, 16:35 UTCJul 25, 17:25 UTC50m
2026-07-25 SWA800 MDW → PIT Jul 25, 13:35 UTCJul 25, 15:30 UTC1h 55m
2026-07-25 SWA2342 SJC → DEN Jul 25, 11:05 UTCJul 25, 11:45 UTC40m
2026-07-25 SWA2342 SJC → DEN Jul 25, 11:01 UTCJul 25, 12:24 UTC1h 23m
2026-07-25 SWA539 BOS → BWI Jul 25, 02:10 UTCJul 25, 02:50 UTC40m
2026-07-24 SWA3140 OMA → PHX Jul 24, 21:00 UTCJul 25, 00:35 UTC3h 35m
2026-07-24 SWA3140 OMA → PHX Jul 24, 20:56 UTCJul 25, 00:30 UTC3h 34m
2026-07-24 SWA4076 LAS → GRR Jul 24, 17:10 UTCJul 24, 19:45 UTC2h 35m
2026-07-24 SWA4076 LAS → GRR Jul 24, 17:07 UTCJul 24, 19:45 UTC2h 38m
2026-07-24 SWA4076 LAS → GRR Jul 24, 15:15 UTCJul 24, 16:15 UTC1h 0m
2026-07-24 SWA3012 BUR → SMF Jul 24, 13:25 UTCJul 24, 14:00 UTC35m
2026-07-24 SWA3012 BUR → SMF Jul 24, 10:40 UTCJul 24, 12:25 UTC1h 45m
2026-07-24 SWA539 BOS → BWI Jul 24, 02:05 UTCJul 24, 02:50 UTC45m
2026-07-23 SWA3140 OMA → PHX Jul 23, 21:10 UTCJul 23, 23:45 UTC2h 35m
2026-07-23 SWA3140 OMA → PHX Jul 23, 21:06 UTCJul 24, 00:40 UTC3h 34m
2026-07-23 SWA4076 LAS → GRR Jul 23, 17:10 UTCJul 23, 19:55 UTC2h 45m
2026-07-23 SWA4076 LAS → GRR Jul 23, 15:25 UTCJul 23, 16:10 UTC45m
2026-07-23 SWA3012 BUR → SMF Jul 23, 13:30 UTCJul 23, 14:10 UTC40m
2026-07-23 SWA3664 - Jul 23, 11:40 UTCJul 23, 12:40 UTC1h 0m
2026-07-22 SWA5061 SJC → LAS Jul 22, 23:45 UTCJul 23, 00:45 UTC1h 0m
2026-07-22 SWA5061 SJC → LAS Jul 22, 23:43 UTCJul 23, 00:43 UTC1h 0m
2026-07-22 SWA5060 - Jul 22, 21:35 UTCJul 22, 22:25 UTC50m
2026-07-22 SWA2222 LAS → OAK Jul 22, 17:10 UTCJul 22, 20:45 UTC3h 35m
2026-07-22 SWA2222 LAS → OAK Jul 22, 14:15 UTCJul 22, 15:10 UTC55m
2026-07-22 SWA2893 SJC → LAS Jul 22, 03:30 UTCJul 22, 05:25 UTC1h 55m
2026-07-21 SWA1342 AUS → MSY Jul 21, 23:40 UTCJul 22, 01:50 UTC2h 10m
2026-07-21 SWA4525 MEM → DAL Jul 21, 20:30 UTCJul 21, 22:20 UTC1h 50m
2026-07-21 SWA719 - Jul 21, 15:15 UTCJul 21, 18:15 UTC3h 0m
2026-07-21 SWA3088 - Jul 21, 01:45 UTCJul 21, 02:40 UTC55m
2026-07-21 SWA3088 SNA → PHX Jul 21, 01:42 UTCJul 21, 02:37 UTC55m
2026-07-20 SWA3088 - Jul 20, 23:45 UTCJul 21, 00:55 UTC1h 10m
2026-07-20 SWA2422 - Jul 20, 21:35 UTCJul 20, 22:35 UTC1h 0m
2026-07-20 SWA2422 - Jul 20, 20:05 UTCJul 20, 20:30 UTC25m
2026-07-20 SWA2422 - Jul 20, 17:50 UTCJul 20, 18:45 UTC55m
2026-07-20 SWA3464 - Jul 20, 15:55 UTCJul 20, 16:35 UTC40m
2026-07-20 SWA4813 - Jul 20, 13:25 UTCJul 20, 14:40 UTC1h 15m
2026-07-20 SWA4191 - Jul 20, 05:20 UTCJul 20, 06:30 UTC1h 10m
2026-07-20 SWA1146 DAL → MKE Jul 20, 00:40 UTCJul 20, 04:00 UTC3h 20m
2026-07-19 SWA1146 DAL → MKE Jul 19, 22:20 UTCJul 19, 23:20 UTC1h 0m
2026-07-19 SWA179 DCA → DAL Jul 19, 18:40 UTCJul 19, 21:10 UTC2h 30m
2026-07-19 SWA1797 STL → LGA Jul 19, 14:50 UTCJul 19, 16:57 UTC2h 7m
2026-07-19 SWA1796 - Jul 19, 13:00 UTCJul 19, 13:50 UTC50m
2026-07-19 SWA1549 BOI → OAK Jul 19, 10:45 UTCJul 19, 11:20 UTC35m

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?
No active broadcast right now. Last signal was Jul 26, 21:45 UTC.
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, SWA800, SWA270, SWA1198.