Apparatus

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sensors Mode-S transponder

A240DC

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N244WN · BOEING 737-700 · operated by SOUTHWEST AIRLINES CO

Hex
A240DC
Octal
50440334
Decimal
10,633,436
Country
US
Tail
N244WN
Type
B737
Broadcasting now · callsign SWA2658 · 40,000 ft
Flights observed
324
Distinct callsigns
20
Country
US
Last broadcast
4h ago

Current position

A240DC is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A240DC 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
SWA184 Southwest Airlines 7 2026-05-27
SWA1572 Southwest Airlines 4 2026-05-27
SWA1378 Southwest Airlines 4 2026-05-28
SWA1213 Southwest Airlines 4 2026-05-29
SWA863 Southwest Airlines 3 2026-06-07
SWA557 Southwest Airlines 3 2026-05-03
SWA554 Southwest Airlines 3 2026-05-30
SWA4518 Southwest Airlines 3 2026-06-03
SWA4415 Southwest Airlines 3 2026-06-01
SWA4265 Southwest Airlines 3 2026-05-09
SWA4 - 3 2026-05-01
SWA3835 Southwest Airlines 3 2026-05-06
SWA3759 Southwest Airlines 3 2026-05-29
SWA3719 Southwest Airlines 3 2026-05-16
SWA342 Southwest Airlines 3 2026-05-26
SWA3412 Southwest Airlines 3 2026-05-10
SWA2780 Southwest Airlines 3 2026-05-25
SWA2769 Southwest Airlines 3 2026-05-30
SWA2762 Southwest Airlines 3 2026-04-30
SWA2612 Southwest Airlines 3 2026-05-27

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-13 SWA1194 BWI → MHT Jun 13, 15:10 UTCJun 13, 16:45 UTC1h 35m
2026-06-13 SWA1194 BWI → MHT Jun 13, 13:20 UTCJun 13, 14:05 UTC45m
2026-06-13 SWA573 STL → PHL Jun 13, 10:35 UTCJun 13, 11:45 UTC1h 10m
2026-06-13 SWA687 DEN → DAL Jun 13, 05:25 UTCJun 13, 06:50 UTC1h 25m
2026-06-13 SWA687 DEN → DAL Jun 13, 05:20 UTCJun 13, 06:46 UTC1h 26m
2026-06-13 SWA1283 BWI → BOS Jun 13, 00:55 UTCJun 13, 03:50 UTC2h 55m
2026-06-12 SWA3255 OAK → BUR Jun 12, 21:30 UTCJun 12, 23:30 UTC2h 0m
2026-06-12 SWA3255 OAK → BUR Jun 12, 21:30 UTCJun 12, 23:26 UTC1h 56m
2026-06-12 SWA1201 CMH → FLL Jun 12, 16:25 UTCJun 12, 17:15 UTC50m
2026-06-12 SWA1201 CMH → FLL Jun 12, 14:15 UTCJun 12, 15:30 UTC1h 15m
2026-06-12 SWA4090 MDW → MSY Jun 12, 11:35 UTCJun 12, 12:45 UTC1h 10m
2026-06-12 SWA4090 MDW → MSY Jun 12, 11:34 UTCJun 12, 12:46 UTC1h 12m
2026-06-12 SWA1551 MCI → LAS Jun 12, 03:05 UTCJun 12, 04:00 UTC55m
2026-06-11 SWA504 STL → SAN Jun 11, 22:45 UTCJun 12, 02:00 UTC3h 16m
2026-06-11 SWA914 LAS → SJC Jun 11, 20:30 UTCJun 11, 21:20 UTC50m
2026-06-11 SWA914 LAS → SJC Jun 11, 18:25 UTCJun 11, 19:20 UTC55m
2026-06-11 SWA1853 SJC → RNO Jun 11, 15:05 UTCJun 11, 17:10 UTC2h 5m
2026-06-11 SWA1853 SJC → RNO Jun 11, 15:03 UTCJun 11, 17:06 UTC2h 3m
2026-06-11 SWA516 SJC → SAN Jun 11, 11:55 UTCJun 11, 13:45 UTC1h 50m
2026-06-11 SWA2382 PHX → OAK Jun 11, 06:20 UTCJun 11, 09:35 UTC3h 15m
2026-06-11 SWA2382 PHX → OAK Jun 11, 06:10 UTCJun 11, 07:00 UTC50m
2026-06-11 SWA2423 LAS → EUG Jun 11, 05:04 UTCJun 11, 06:01 UTC57m
2026-06-11 SWA2382 PHX → OAK Jun 11, 06:10 UTCJun 11, 09:34 UTC3h 24m
2026-06-11 SWA2423 LAS → EUG Jun 11, 01:10 UTCJun 11, 04:15 UTC3h 5m
2026-06-10 SWA194 DEN → SFO Jun 10, 23:05 UTCJun 11, 00:05 UTC1h 0m
2026-06-10 SWA194 DEN → SFO Jun 10, 20:10 UTCJun 10, 21:50 UTC1h 40m
2026-06-10 SWA1429 BHM → MDW Jun 10, 17:45 UTCJun 10, 18:50 UTC1h 5m
2026-06-10 SWA1429 BHM → MDW Jun 10, 15:55 UTCJun 10, 16:50 UTC55m
2026-06-10 SWA866 PWM → BWI Jun 10, 13:30 UTCJun 10, 14:55 UTC1h 25m
2026-06-08 SWA2529 MDW → MCO Jun 8, 23:30 UTCJun 9, 00:45 UTC1h 15m
2026-06-08 SWA2529 MDW → MCO Jun 8, 20:20 UTCJun 8, 22:25 UTC2h 5m
2026-06-08 SWA5063 BNA → BWI Jun 8, 17:35 UTCJun 8, 19:20 UTC1h 45m
2026-06-08 SWA2491 PWM → MDW Jun 8, 15:10 UTCJun 8, 16:05 UTC55m
2026-06-08 SWA3057 PHX → AUS Jun 8, 02:40 UTCJun 8, 03:00 UTC20m
2026-06-08 SWA3057 PHX → AUS Jun 8, 02:39 UTCJun 8, 03:37 UTC58m
2026-06-08 SWA1592 AUS → ORD Jun 8, 00:45 UTCJun 8, 01:50 UTC1h 5m
2026-06-07 SWA240 DEN → TUL Jun 7, 20:05 UTCJun 7, 23:15 UTC3h 10m
2026-06-07 SWA240 DEN → TUL Jun 7, 17:40 UTCJun 7, 18:55 UTC1h 15m
2026-06-07 SWA3285 LAS → LBB Jun 7, 15:20 UTCJun 7, 16:30 UTC1h 10m
2026-06-07 SWA372 SEA → OAK Jun 7, 13:05 UTCJun 7, 14:10 UTC1h 5m
2026-06-07 SWA863 BWI → PVD Jun 7, 01:30 UTCJun 7, 03:40 UTC2h 10m
2026-06-07 SWA863 BWI → PVD Jun 7, 01:24 UTCJun 7, 03:36 UTC2h 12m
2026-06-06 SWA863 BWI → PVD Jun 6, 22:25 UTCJun 7, 00:30 UTC2h 5m
2026-06-06 SWA947 CVG → MDW Jun 6, 19:10 UTCJun 6, 21:09 UTC2h 0m
2026-06-06 SWA1345 ISP → BWI Jun 6, 16:34 UTCJun 6, 18:00 UTC1h 25m
2026-06-06 SWA724 SEA → SJC Jun 6, 12:54 UTCJun 6, 15:10 UTC2h 15m
2026-06-06 SWA724 SEA → SJC Jun 6, 12:51 UTCJun 6, 15:05 UTC2h 14m
2026-06-06 SWA883 SAN → SJC Jun 6, 10:50 UTCJun 6, 11:39 UTC50m
2026-06-06 SWA2746 FLL → MCO Jun 6, 02:20 UTCJun 6, 03:45 UTC1h 25m
2026-06-06 SWA4073 PHX → DAL Jun 6, 00:35 UTCJun 6, 01:40 UTC1h 5m

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 N244WN page for operator, model, and routing details .

Mode-S A240DC frequently asked

What is Mode-S code A240DC?
A240DC is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N244WN.
Where is Mode-S A240DC registered?
Mode-S code A240DC 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 A240DC broadcasting right now?
Yes. Mode-S A240DC is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A240DC, octal 50440334, decimal 10,633,436.
What flights does A240DC operate?
Mode-S A240DC has broadcast 20 distinct callsigns, including SWA184, SWA1572, SWA1378, SWA1213, SWA863.