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sensors Mode-S transponder

ACA3D1

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N913WN · BOEING 737-700 · operated by SOUTHWEST AIRLINES CO

Hex
ACA3D1
Octal
53121721
Decimal
11,314,129
Country
US
Tail
N913WN
Type
B737
No current signal · last broadcast Jul 26, 22:15 UTC
Flights observed
774
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:15 UTC

Last known position

Most recent position reported by Mode-S ACA3D1.

Country allocation

The ICAO 24-bit address ACA3D1 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 6 2026-04-17
SWA2154 - 6 2026-06-29
SWA716 - 5 2026-06-23
SWA4020 Southwest Airlines 5 2026-05-10
SWA3130 - 5 2026-06-22
SWA267 Southwest Airlines 5 2026-05-17
SWA2384 Southwest Airlines 5 2026-06-04
SWA2335 Southwest Airlines 5 2026-07-26
SWA1001 Southwest Airlines 5 2026-05-28
SWA487 Southwest Airlines 4 2026-04-27
SWA472 - 4 2026-07-09
SWA4461 Southwest Airlines 4 2026-06-26
SWA4266 Southwest Airlines 4 2026-05-28
SWA3336 - 4 2026-06-29
SWA3090 - 4 2026-07-21
SWA3078 Southwest Airlines 4 2026-05-04
SWA2886 Southwest Airlines 4 2026-05-09
SWA2458 - 4 2026-07-17
SWA2422 Southwest Airlines 4 2026-07-23
SWA2165 Southwest Airlines 4 2026-07-20

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SWA1765 BWI → MHT Jul 26, 21:15 UTCJul 26, 22:15 UTC1h 0m
2026-07-26 SWA4384 ISP → BWI Jul 26, 17:15 UTCJul 26, 20:15 UTC3h 0m
2026-07-26 SWA4384 ISP → BWI Jul 26, 17:11 UTCJul 26, 20:07 UTC2h 56m
2026-07-26 SWA2629 SJC → SAN Jul 26, 12:35 UTCJul 26, 15:50 UTC3h 15m
2026-07-26 SWA4590 SJC → EUG Jul 26, 06:10 UTCJul 26, 10:15 UTC4h 6m
2026-07-26 SWA2335 HOU → LGA Jul 26, 02:35 UTCJul 26, 03:35 UTC1h 0m
2026-07-26 SWA2335 HOU → LGA Jul 26, 00:30 UTCJul 26, 01:50 UTC1h 20m
2026-07-25 SWA4095 MSY → TPA Jul 25, 21:25 UTCJul 25, 23:10 UTC1h 45m
2026-07-25 SWA4811 OAK → BUR Jul 25, 19:25 UTCJul 25, 20:30 UTC1h 5m
2026-07-25 SWA3860 STL → MDW Jul 25, 17:25 UTCJul 25, 18:20 UTC55m
2026-07-25 SWA3715 RSW → MKE Jul 25, 15:30 UTCJul 25, 16:10 UTC40m
2026-07-25 SWA3715 RSW → MKE Jul 25, 15:25 UTCJul 25, 16:07 UTC42m
2026-07-25 SWA1559 PVD → TPA Jul 25, 12:50 UTCJul 25, 14:15 UTC1h 25m
2026-07-25 SWA3233 TPA → CMH Jul 25, 04:05 UTCJul 25, 05:30 UTC1h 25m
2026-07-25 SWA3233 TPA → CMH Jul 25, 04:03 UTCJul 25, 05:25 UTC1h 22m
2026-07-25 SWA3538 TPA → BNA Jul 25, 02:10 UTCJul 25, 03:25 UTC1h 15m
2026-07-24 SWA3538 TPA → BNA Jul 24, 23:50 UTCJul 25, 01:15 UTC1h 25m
2026-07-24 SWA3538 TPA → BNA Jul 24, 22:00 UTCJul 24, 23:00 UTC1h 0m
2026-07-24 SWA2272 DEN → BNA Jul 24, 20:05 UTCJul 24, 20:55 UTC50m
2026-07-24 SWA2272 DEN → BNA Jul 24, 16:45 UTCJul 24, 17:45 UTC1h 0m
2026-07-24 SWA3179 BUR → OAK Jul 24, 14:55 UTCJul 24, 15:40 UTC45m
2026-07-24 SWA3179 BUR → OAK Jul 24, 14:52 UTCJul 24, 15:45 UTC53m
2026-07-24 SWA1842 BUR → OAK Jul 24, 12:35 UTCJul 24, 13:20 UTC45m
2026-07-24 SWA1842 BUR → OAK Jul 24, 12:30 UTCJul 24, 13:14 UTC44m
2026-07-24 SWA948 AUS → MCO Jul 24, 06:00 UTCJul 24, 06:45 UTC45m
2026-07-24 SWA948 AUS → MCO Jul 24, 02:55 UTCJul 24, 04:15 UTC1h 20m
2026-07-23 SWA237 PDX → SJC Jul 23, 23:25 UTCJul 24, 01:25 UTC2h 0m
2026-07-23 SWA2422 MKE → MCO Jul 23, 21:25 UTCJul 23, 22:20 UTC55m
2026-07-23 SWA2422 MKE → MCO Jul 23, 21:15 UTCJul 23, 22:16 UTC1h 1m
2026-07-23 SWA2422 MKE → MCO Jul 23, 19:45 UTCJul 23, 20:10 UTC25m
2026-07-23 SWA2422 MKE → MCO Jul 23, 17:50 UTCJul 23, 18:35 UTC45m
2026-07-23 SWA3464 ATL → MSY Jul 23, 16:05 UTCJul 23, 16:45 UTC40m
2026-07-23 SWA4813 DEN → LGA Jul 23, 13:45 UTCJul 23, 15:00 UTC1h 15m
2026-07-23 SWA4191 STL → MSY Jul 23, 04:10 UTCJul 23, 05:25 UTC1h 15m
2026-07-22 SWA2696 DAL → SAN Jul 22, 22:30 UTCJul 23, 02:50 UTC4h 20m
2026-07-22 SWA400 SAN → AUS Jul 22, 19:00 UTCJul 22, 21:15 UTC2h 15m
2026-07-22 SWA400 SAN → AUS Jul 22, 18:59 UTCJul 22, 21:11 UTC2h 12m
2026-07-22 SWA1729 OAK → SAN Jul 22, 15:35 UTCJul 22, 17:55 UTC2h 20m
2026-07-22 SWA1729 OAK → SAN Jul 22, 15:34 UTCJul 22, 17:50 UTC2h 16m
2026-07-22 SWA285 IND → MCO Jul 22, 11:55 UTCJul 22, 13:40 UTC1h 45m
2026-07-22 SWA4591 SBA → OAK Jul 22, 01:40 UTCJul 22, 03:50 UTC2h 10m
2026-07-21 SWA1125 LGB → SJC Jul 21, 19:50 UTCJul 22, 00:05 UTC4h 15m
2026-07-21 SWA3090 - Jul 21, 18:05 UTCJul 21, 18:15 UTC10m
2026-07-21 SWA3090 BUR → LAS Jul 21, 18:00 UTCJul 21, 18:45 UTC45m
2026-07-21 SWA2929 BNA → SAV Jul 21, 14:28 UTCJul 21, 16:25 UTC1h 57m
2026-07-21 SWA2929 BNA → SAV Jul 21, 14:30 UTCJul 21, 16:25 UTC1h 55m
2026-07-21 SWA1296 DAL → DEN Jul 21, 11:10 UTCJul 21, 12:40 UTC1h 30m
2026-07-20 SWA1859 BDL → BWI Jul 20, 23:00 UTCJul 21, 02:15 UTC3h 15m
2026-07-20 SWA1859 BDL → BWI Jul 20, 23:00 UTCJul 21, 02:12 UTC3h 12m
2026-07-20 SWA2165 SJC → PDX Jul 20, 20:35 UTCJul 20, 21:30 UTC55m

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 N913WN page for operator, model, and routing details .

Mode-S ACA3D1 frequently asked

What is Mode-S code ACA3D1?
ACA3D1 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N913WN.
Where is Mode-S ACA3D1 registered?
Mode-S code ACA3D1 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 ACA3D1 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:15 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex ACA3D1, octal 53121721, decimal 11,314,129.
What flights does ACA3D1 operate?
Mode-S ACA3D1 has broadcast 20 distinct callsigns, including SWA3968, SWA2154, SWA716, SWA4020, SWA3130.