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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
Broadcasting now · callsign SWA1106 · 24,125 ft
Flights observed
658
Distinct callsigns
20
Country
US
Last broadcast
2h ago

Current position

AC74E4 is currently broadcasting. Map zoomed to live position.

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
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
SWA2764 Southwest Airlines 4 2026-05-26
SWA2529 Southwest Airlines 4 2026-06-29
SWA228 Southwest Airlines 4 2026-06-22
SWA1363 Southwest Airlines 4 2026-05-21

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 SWA3183 ORF → BWI Jul 14, 10:15 UTCJul 14, 10:45 UTC30m
2026-07-14 SWA3183 ORF → BWI Jul 14, 10:10 UTCJul 14, 10:43 UTC33m
2026-07-14 SWA352 MCO → ORF Jul 14, 04:00 UTCJul 14, 05:35 UTC1h 35m
2026-07-14 SWA1352 DAL → MCO Jul 14, 00:35 UTCJul 14, 02:50 UTC2h 15m
2026-07-13 SWA936 RDU → DAL Jul 13, 21:05 UTCJul 13, 23:35 UTC2h 30m
2026-07-13 SWA4605 TPA → RDU Jul 13, 18:15 UTCJul 13, 19:55 UTC1h 40m
2026-07-13 SWA4605 TPA → RDU Jul 13, 18:11 UTCJul 13, 19:51 UTC1h 40m
2026-07-13 SWA3986 - Jul 13, 15:15 UTCJul 13, 17:15 UTC2h 0m
2026-07-13 SWA3986 STL → TPA Jul 13, 15:14 UTCJul 13, 17:14 UTC2h 0m
2026-07-13 SWA2973 MSP → STL Jul 13, 13:00 UTCJul 13, 14:05 UTC1h 5m
2026-07-13 SWA4085 - Jul 13, 02:50 UTCJul 13, 03:45 UTC55m
2026-07-12 SWA2474 - Jul 12, 23:05 UTCJul 13, 00:55 UTC1h 50m
2026-07-12 SWA2599 STL → PNS Jul 12, 20:30 UTCJul 12, 21:53 UTC1h 23m
2026-07-12 SWA2599 - Jul 12, 20:30 UTCJul 12, 21:50 UTC1h 20m
2026-07-12 SWA1996 CUN → STL Jul 12, 15:40 UTCJul 12, 18:20 UTC2h 40m
2026-07-12 SWA1976 - Jul 12, 11:25 UTCJul 12, 14:10 UTC2h 45m
2026-07-12 SWA3267 - Jul 12, 01:10 UTCJul 12, 02:40 UTC1h 30m
2026-07-11 SWA3267 - Jul 11, 23:15 UTCJul 12, 00:35 UTC1h 20m
2026-07-11 SWA3938 - Jul 11, 20:05 UTCJul 11, 21:55 UTC1h 50m
2026-07-11 SWA3938 SRQ → HOU Jul 11, 20:04 UTCJul 11, 21:57 UTC1h 53m
2026-07-11 SWA2082 - Jul 11, 17:10 UTCJul 11, 19:20 UTC2h 10m
2026-07-11 SWA2082 - Jul 11, 15:10 UTCJul 11, 15:55 UTC45m
2026-07-11 SWA2913 - Jul 11, 13:25 UTCJul 11, 14:00 UTC35m
2026-07-11 SWA2913 MEM → BNA Jul 11, 13:20 UTCJul 11, 13:54 UTC34m
2026-07-11 SWA4100 - Jul 11, 02:40 UTCJul 11, 03:55 UTC1h 15m
2026-07-10 SWA2920 - Jul 10, 23:05 UTCJul 11, 01:10 UTC2h 5m
2026-07-10 SWA4736 - Jul 10, 21:00 UTCJul 10, 22:00 UTC1h 0m
2026-07-10 SWA4734 - Jul 10, 19:10 UTCJul 10, 20:00 UTC50m
2026-07-10 SWA894 - Jul 10, 17:20 UTCJul 10, 18:10 UTC50m
2026-07-10 SWA758 - Jul 10, 15:20 UTCJul 10, 16:10 UTC50m
2026-07-10 SWA758 - Jul 10, 13:15 UTCJul 10, 14:20 UTC1h 5m
2026-07-10 SWA2732 - Jul 10, 10:05 UTCJul 10, 12:10 UTC2h 5m
2026-07-10 SWA2732 MHT → MDW Jul 10, 10:03 UTCJul 10, 12:10 UTC2h 7m
2026-07-10 SWA1668 BWI → MHT Jul 10, 05:50 UTCJul 10, 06:50 UTC1h 0m
2026-07-10 SWA889 MCO → BWI Jul 10, 00:35 UTCJul 10, 02:50 UTC2h 15m
2026-07-09 SWA3222 PHL → MCO Jul 9, 19:00 UTCJul 9, 20:58 UTC1h 58m
2026-07-09 SWA3222 PHL → MCO Jul 9, 19:00 UTCJul 9, 21:00 UTC2h 0m
2026-07-09 SWA3222 - Jul 9, 15:15 UTCJul 9, 17:10 UTC1h 55m
2026-07-09 SWA4809 SJC → LAS Jul 9, 12:20 UTCJul 9, 14:20 UTC2h 0m
2026-07-09 SWA2073 - Jul 9, 05:05 UTCJul 9, 06:50 UTC1h 45m
2026-07-09 SWA2073 PHX → DEN Jul 9, 02:00 UTCJul 9, 03:50 UTC1h 50m
2026-07-08 SWA198 - Jul 8, 22:50 UTCJul 8, 23:50 UTC1h 0m
2026-07-08 SWA198 - Jul 8, 20:45 UTCJul 8, 21:40 UTC55m
2026-07-08 SWA222 PHX → SFO Jul 8, 17:40 UTCJul 8, 19:30 UTC1h 50m
2026-07-08 SWA222 PHX → SFO Jul 8, 17:37 UTCJul 8, 19:20 UTC1h 44m
2026-07-08 SWA820 BUR → PHX Jul 8, 02:15 UTCJul 8, 03:20 UTC1h 5m
2026-07-08 SWA3768 SMF → BUR Jul 8, 00:05 UTCJul 8, 01:00 UTC55m
2026-07-07 SWA963 - Jul 7, 21:50 UTCJul 7, 22:50 UTC1h 0m
2026-07-07 SWA963 - Jul 7, 18:15 UTCJul 7, 20:55 UTC2h 40m
2026-07-07 SWA3940 - Jul 7, 16:10 UTCJul 7, 17:00 UTC50m

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?
Yes. Mode-S AC74E4 is currently airborne.
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.