Apparatus

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sensors Mode-S transponder

AC74E4

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N901WN · BOEING 737-700 · operated by SOUTHWEST AIRLINES CO

Hex
AC74E4
Octal
53072344
Decimal
11,302,116
Country
US
Tail
N901WN
Type
B737
Transponder active on ground
Flights observed
748
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 23:00 UTC

Last known position

Most recent position reported by Mode-S AC74E4.

Country allocation

The ICAO 24-bit address AC74E4 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
SWA1013 - 10 2026-06-28
SWA5058 Southwest Airlines 7 2026-06-19
SWA837 - 6 2026-06-28
SWA615 - 6 2026-06-19
SWA50 Southwest Airlines 6 2026-04-24
SWA3017 - 6 2026-06-23
SWA610 Southwest Airlines 5 2026-06-19
SWA3816 Southwest Airlines 5 2026-04-24
SWA307 Southwest Airlines 5 2026-05-25
SWA2676 Southwest Airlines 5 2026-05-20
SWA2577 Southwest Airlines 5 2026-04-26
SWA1437 - 5 2026-07-05
SWA579 - 4 2026-07-20
SWA4871 Southwest Airlines 4 2026-06-23
SWA4355 Southwest Airlines 4 2026-06-16
SWA4090 Southwest Airlines 4 2026-05-22
SWA3183 - 4 2026-07-14
SWA2794 - 4 2026-07-18
SWA2764 Southwest Airlines 4 2026-05-26
SWA2753 - 4 2026-07-18

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SWA1018 CUN → DEN Jul 26, 21:30 UTCJul 26, 23:00 UTC1h 30m
2026-07-26 SWA1735 PHX → CUN Jul 26, 16:20 UTCJul 26, 20:10 UTC3h 50m
2026-07-26 SWA478 OAK → SAN Jul 26, 14:25 UTCJul 26, 14:55 UTC30m
2026-07-26 SWA4313 MCO → ISP Jul 26, 03:00 UTCJul 26, 04:30 UTC1h 30m
2026-07-26 SWA2288 BWI → CHS Jul 26, 00:15 UTCJul 26, 01:40 UTC1h 25m
2026-07-26 SWA2288 BWI → CHS Jul 26, 00:13 UTCJul 26, 01:38 UTC1h 26m
2026-07-25 SWA1755 MCO → CMH Jul 25, 20:20 UTCJul 25, 22:45 UTC2h 25m
2026-07-25 SWA1755 MCO → CMH Jul 25, 20:19 UTCJul 25, 22:51 UTC2h 32m
2026-07-25 SWA8501 PAE → OAK Jul 25, 17:30 UTCJul 25, 18:05 UTC35m
2026-07-24 SWA2422 MKE → MCO Jul 24, 20:45 UTCJul 24, 21:10 UTC25m
2026-07-24 SWA1285 MEM → ATL Jul 24, 18:05 UTCJul 24, 19:10 UTC1h 5m
2026-07-24 SWA3868 MCI → SAN Jul 24, 15:55 UTCJul 24, 17:00 UTC1h 5m
2026-07-24 SWA3715 - Jul 24, 14:25 UTCJul 24, 15:10 UTC45m
2026-07-24 SWA4422 SAN → SJC Jul 24, 12:15 UTCJul 24, 13:00 UTC45m
2026-07-24 SWA373 SNA → SJC Jul 24, 05:35 UTCJul 24, 06:25 UTC50m
2026-07-24 SWA138 OAK → LAS Jul 24, 03:25 UTCJul 24, 04:40 UTC1h 15m
2026-07-24 SWA138 OAK → LAS Jul 24, 01:05 UTCJul 24, 02:00 UTC55m
2026-07-23 SWA138 OAK → LAS Jul 23, 22:15 UTCJul 24, 00:10 UTC1h 55m
2026-07-23 SWA1493 OAK → LAX Jul 23, 20:00 UTCJul 23, 21:00 UTC1h 0m
2026-07-23 SWA1493 OAK → LAX Jul 23, 19:55 UTCJul 23, 20:57 UTC1h 2m
2026-07-23 SWA4805 MCO → BDL Jul 23, 17:35 UTCJul 23, 18:55 UTC1h 20m
2026-07-23 SWA146 - Jul 23, 15:05 UTCJul 23, 16:20 UTC1h 15m
2026-07-23 SWA2423 LAS → EUG Jul 23, 05:35 UTCJul 23, 06:30 UTC55m
2026-07-23 SWA2423 LAS → EUG Jul 23, 05:34 UTCJul 23, 06:28 UTC54m
2026-07-23 SWA2423 LAS → EUG Jul 23, 01:45 UTCJul 23, 04:35 UTC2h 50m
2026-07-22 SWA194 DEN → SFO Jul 22, 23:45 UTCJul 23, 00:45 UTC1h 0m
2026-07-22 SWA2758 DEN → LAS Jul 22, 20:35 UTCJul 22, 22:20 UTC1h 45m
2026-07-22 SWA2571 DAL → MDW Jul 22, 18:00 UTCJul 22, 18:55 UTC55m
2026-07-22 SWA2571 DAL → MDW Jul 22, 14:30 UTCJul 22, 16:55 UTC2h 25m
2026-07-22 SWA3443 - Jul 22, 11:10 UTCJul 22, 13:20 UTC2h 10m
2026-07-22 SWA3443 SAT → LAS Jul 22, 11:02 UTCJul 22, 13:19 UTC2h 18m
2026-07-22 SWA3979 DEN → BOI Jul 22, 02:50 UTCJul 22, 04:30 UTC1h 40m
2026-07-22 SWA3979 DEN → BOI Jul 22, 02:48 UTCJul 22, 04:25 UTC1h 37m
2026-07-22 SWA2533 SJC → SAN Jul 22, 00:40 UTCJul 22, 02:05 UTC1h 25m
2026-07-21 SWA277 BUR → DEN Jul 21, 22:30 UTCJul 21, 23:50 UTC1h 20m
2026-07-21 SWA277 BUR → DEN Jul 21, 20:40 UTCJul 21, 21:20 UTC40m
2026-07-21 SWA4227 MCO → PHX Jul 21, 15:45 UTCJul 21, 18:55 UTC3h 10m
2026-07-21 SWA947 CVG → MDW Jul 21, 13:45 UTCJul 21, 14:40 UTC55m
2026-07-21 SWA868 PHX → SNA Jul 21, 08:15 UTCJul 21, 09:15 UTC1h 0m
2026-07-21 SWA868 PHX → SNA Jul 21, 08:14 UTCJul 21, 09:05 UTC51m
2026-07-21 SWA4447 DEN → PHX Jul 21, 05:45 UTCJul 21, 07:05 UTC1h 20m
2026-07-20 SWA1001 MCO → BWI Jul 20, 23:35 UTCJul 21, 01:45 UTC2h 10m
2026-07-20 SWA851 BUR → SMF Jul 20, 21:25 UTCJul 20, 22:20 UTC55m
2026-07-20 SWA579 DEN → BUR Jul 20, 18:20 UTCJul 20, 20:10 UTC1h 50m
2026-07-20 SWA579 DEN → BUR Jul 20, 18:15 UTCJul 20, 20:08 UTC1h 53m
2026-07-20 SWA579 - Jul 20, 15:15 UTCJul 20, 17:05 UTC1h 50m
2026-07-20 SWA579 - Jul 20, 13:35 UTCJul 20, 14:10 UTC35m
2026-07-20 SWA430 - Jul 20, 10:35 UTCJul 20, 11:15 UTC40m
2026-07-20 SWA430 BHM → BNA Jul 20, 10:34 UTCJul 20, 11:12 UTC38m
2026-07-20 SWA4390 MDW → TPA Jul 20, 04:15 UTCJul 20, 05:35 UTC1h 20m

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 N901WN page for operator, model, and routing details .

Mode-S AC74E4 frequently asked

What is Mode-S code AC74E4?
AC74E4 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N901WN.
Where is Mode-S AC74E4 registered?
Mode-S code AC74E4 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 AC74E4 broadcasting right now?
Mode-S AC74E4 is currently broadcasting from the ground.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AC74E4, octal 53072344, decimal 11,302,116.
What flights does AC74E4 operate?
Mode-S AC74E4 has broadcast 20 distinct callsigns, including SWA1013, SWA5058, SWA837, SWA615, SWA50.