Apparatus

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sensors Mode-S transponder

AD01AB

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N937WN · BOEING 737-700 · operated by SOUTHWEST AIRLINES CO

Hex
AD01AB
Octal
53200653
Decimal
11,338,155
Country
US
Tail
N937WN
Type
B737
No current signal · last broadcast Jul 26, 22:45 UTC
Flights observed
715
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:45 UTC

Last known position

Most recent position reported by Mode-S AD01AB.

Country allocation

The ICAO 24-bit address AD01AB 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
SWA1037 - 8 2026-06-29
SWA470 - 6 2026-07-13
SWA2409 Southwest Airlines 6 2026-05-19
SWA1204 Southwest Airlines 6 2026-04-18
SWA738 Southwest Airlines 5 2026-06-14
SWA487 - 5 2026-07-16
SWA2384 Southwest Airlines 5 2026-06-08
SWA1761 Southwest Airlines 5 2026-05-16
SWA1654 - 5 2026-04-17
SWA970 Southwest Airlines 4 2026-05-19
SWA957 - 4 2026-06-27
SWA868 - 4 2026-07-03
SWA579 Southwest Airlines 4 2026-07-26
SWA4518 - 4 2026-04-14
SWA3002 Southwest Airlines 4 2026-05-16
SWA2866 - 4 2026-07-17
SWA2182 - 4 2026-07-13
SWA2061 Southwest Airlines 4 2026-05-14
SWA1787 - 4 2026-04-13
SWA1742 - 4 2026-07-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SWA259 BUR → OAK Jul 26, 21:00 UTCJul 26, 22:45 UTC1h 45m
2026-07-26 SWA4719 DCA → STL Jul 26, 17:35 UTCJul 26, 19:40 UTC2h 5m
2026-07-26 SWA579 AUS → CMH Jul 26, 14:55 UTCJul 26, 16:30 UTC1h 35m
2026-07-26 SWA579 AUS → CMH Jul 26, 14:52 UTCJul 26, 16:26 UTC1h 34m
2026-07-26 SWA579 AUS → CMH Jul 26, 13:30 UTCJul 26, 14:05 UTC35m
2026-07-26 SWA3418 BUR → LAS Jul 26, 10:50 UTCJul 26, 12:05 UTC1h 15m
2026-07-26 SWA3810 SJC → AUS Jul 26, 00:30 UTCJul 26, 02:05 UTC1h 35m
2026-07-25 SWA493 PHX → LGB Jul 25, 21:40 UTCJul 25, 23:20 UTC1h 40m
2026-07-25 SWA1360 FLL → TPA Jul 25, 19:00 UTCJul 25, 20:35 UTC1h 35m
2026-07-25 SWA1360 FLL → TPA Jul 25, 18:59 UTCJul 25, 20:29 UTC1h 30m
2026-07-25 SWA606 SFO → PHX Jul 25, 16:30 UTCJul 25, 18:10 UTC1h 40m
2026-07-25 SWA606 SFO → PHX Jul 25, 13:20 UTCJul 25, 15:20 UTC2h 0m
2026-07-25 SWA606 SFO → PHX Jul 25, 10:25 UTCJul 25, 11:25 UTC1h 0m
2026-07-25 SWA3883 DAL → STL Jul 25, 01:30 UTCJul 25, 02:35 UTC1h 5m
2026-07-24 SWA4341 STL → DCA Jul 24, 23:25 UTCJul 25, 00:00 UTC35m
2026-07-24 SWA2812 DAL → SRQ Jul 24, 21:10 UTCJul 24, 22:10 UTC1h 0m
2026-07-24 SWA4516 TPA → PIT Jul 24, 17:55 UTCJul 24, 19:25 UTC1h 30m
2026-07-24 SWA4516 TPA → PIT Jul 24, 14:25 UTCJul 24, 17:00 UTC2h 35m
2026-07-24 SWA4866 MCO → MSY Jul 24, 11:15 UTCJul 24, 13:25 UTC2h 10m
2026-07-24 SWA4866 MCO → MSY Jul 24, 11:10 UTCJul 24, 13:19 UTC2h 9m
2026-07-24 SWA3406 SMF → BUR Jul 24, 03:00 UTCJul 24, 03:50 UTC50m
2026-07-24 SWA3406 SMF → BUR Jul 24, 02:56 UTCJul 24, 03:50 UTC54m
2026-07-23 SWA1111 BUR → OAK Jul 23, 23:40 UTCJul 24, 01:35 UTC1h 55m
2026-07-23 SWA4536 DAL → AUS Jul 23, 21:00 UTCJul 23, 22:05 UTC1h 5m
2026-07-23 SWA4536 DAL → AUS Jul 23, 20:56 UTCJul 23, 22:00 UTC1h 4m
2026-07-23 SWA1432 - Jul 23, 19:05 UTCJul 23, 20:05 UTC1h 0m
2026-07-23 SWA1432 - Jul 23, 16:15 UTCJul 23, 17:55 UTC1h 40m
2026-07-23 SWA1432 - Jul 23, 14:45 UTCJul 23, 15:20 UTC35m
2026-07-23 SWA1432 - Jul 23, 10:35 UTCJul 23, 13:15 UTC2h 40m
2026-07-22 SWA699 MSY → DCA Jul 22, 22:50 UTCJul 23, 01:05 UTC2h 15m
2026-07-22 SWA699 - Jul 22, 19:25 UTCJul 22, 21:40 UTC2h 15m
2026-07-22 SWA699 - Jul 22, 16:45 UTCJul 22, 18:15 UTC1h 30m
2026-07-22 SWA818 SNA → SMF Jul 22, 14:15 UTCJul 22, 15:45 UTC1h 30m
2026-07-22 SWA3127 ATL → BWI Jul 22, 11:35 UTCJul 22, 12:45 UTC1h 10m
2026-07-22 SWA3127 ATL → BWI Jul 22, 11:29 UTCJul 22, 12:35 UTC1h 6m
2026-07-22 SWA4912 LAS → MCO Jul 22, 02:35 UTCJul 22, 03:30 UTC55m
2026-07-22 SWA3387 SJC → HNL Jul 22, 00:20 UTCJul 22, 01:45 UTC1h 25m
2026-07-22 SWA3387 SJC → HNL Jul 22, 00:16 UTCJul 22, 01:45 UTC1h 29m
2026-07-21 SWA1850 OAK → AUS Jul 21, 22:20 UTCJul 21, 23:25 UTC1h 5m
2026-07-21 SWA1850 OAK → AUS Jul 21, 22:16 UTCJul 21, 23:25 UTC1h 9m
2026-07-21 SWA1850 OAK → AUS Jul 21, 19:00 UTCJul 21, 20:50 UTC1h 50m
2026-07-21 SWA4355 BUR → OAK Jul 21, 15:40 UTCJul 21, 17:55 UTC2h 15m
2026-07-21 SWA4456 SJC → PDX Jul 21, 12:20 UTCJul 21, 13:55 UTC1h 35m
2026-07-21 SWA4456 SJC → PDX Jul 21, 12:15 UTCJul 21, 13:49 UTC1h 34m
2026-07-21 SWA4387 SJC → BUR Jul 21, 03:10 UTCJul 21, 04:20 UTC1h 10m
2026-07-21 SWA4387 SJC → BUR Jul 21, 03:06 UTCJul 21, 04:20 UTC1h 14m
2026-07-21 SWA1417 ABQ → OAK Jul 21, 01:05 UTCJul 21, 02:20 UTC1h 15m
2026-07-20 SWA1417 ABQ → OAK Jul 20, 20:20 UTCJul 21, 00:00 UTC3h 40m
2026-07-20 SWA827 BUR → SFO Jul 20, 17:15 UTCJul 20, 18:15 UTC1h 0m
2026-07-20 SWA827 BUR → SFO Jul 20, 17:15 UTCJul 20, 18:04 UTC49m

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 N937WN page for operator, model, and routing details .

Mode-S AD01AB frequently asked

What is Mode-S code AD01AB?
AD01AB is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N937WN.
Where is Mode-S AD01AB registered?
Mode-S code AD01AB 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 AD01AB 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 AD01AB, octal 53200653, decimal 11,338,155.
What flights does AD01AB operate?
Mode-S AD01AB has broadcast 20 distinct callsigns, including SWA1037, SWA470, SWA2409, SWA1204, SWA738.