Apparatus

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sensors Mode-S transponder

AC4279

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N8896L · BOEING 737 MAX 8 · operated by SOUTHWEST AIRLINES CO

Hex
AC4279
Octal
53041171
Decimal
11,289,209
Country
US
Tail
N8896L
Type
B38M
No current signal · last broadcast Jul 26, 22:15 UTC
Flights observed
751
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:15 UTC

Last known position

Most recent position reported by Mode-S AC4279.

Country allocation

The ICAO 24-bit address AC4279 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
SWA120 Southwest Airlines 7 2026-07-23
SWA3457 Southwest Airlines 5 2026-04-17
SWA2391 Southwest Airlines 5 2026-06-04
SWA4798 - 4 2026-07-02
SWA4127 Southwest Airlines 4 2026-04-22
SWA3208 - 4 2026-06-27
SWA2004 Southwest Airlines 4 2026-04-18
SWA172 - 4 2026-07-01
SWA1361 Southwest Airlines 4 2026-07-02
SWA1266 Southwest Airlines 4 2026-05-19
SWA1048 Southwest Airlines 4 2026-07-21
SWA739 Southwest Airlines 3 2026-07-25
SWA706 - 3 2026-06-26
SWA7 Southwest Airlines 3 2026-05-07
SWA699 Southwest Airlines 3 2026-05-27
SWA4573 Southwest Airlines 3 2026-05-12
SWA4472 - 3 2026-06-29
SWA4342 Southwest Airlines 3 2026-04-22
SWA4271 - 3 2026-07-21
SWA3937 - 3 2026-06-19

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SWA1075 DEN → MCO Jul 26, 20:30 UTCJul 26, 22:15 UTC1h 45m
2026-07-26 SWA1074 SAN → SMF Jul 26, 14:45 UTCJul 26, 18:00 UTC3h 15m
2026-07-26 SWA1074 SAN → SMF Jul 26, 14:41 UTCJul 26, 18:31 UTC3h 50m
2026-07-26 SWA1541 LGA → DEN Jul 26, 11:08 UTCJul 26, 13:03 UTC1h 55m
2026-07-26 SWA1541 LGA → DEN Jul 26, 11:10 UTCJul 26, 13:00 UTC1h 50m
2026-07-26 SWA3843 ABQ → LAS Jul 26, 01:40 UTCJul 26, 03:05 UTC1h 25m
2026-07-26 SWA3843 ABQ → LAS Jul 26, 01:39 UTCJul 26, 03:03 UTC1h 24m
2026-07-25 SWA3843 ABQ → LAS Jul 25, 23:40 UTCJul 26, 00:30 UTC50m
2026-07-25 SWA2059 LAS → BOI Jul 25, 21:25 UTCJul 25, 22:40 UTC1h 15m
2026-07-25 SWA2059 LAS → BOI Jul 25, 18:30 UTCJul 25, 20:00 UTC1h 30m
2026-07-25 SWA739 STL → LGA Jul 25, 14:55 UTCJul 25, 16:55 UTC2h 0m
2026-07-25 SWA739 STL → LGA Jul 25, 14:53 UTCJul 25, 16:53 UTC2h 0m
2026-07-25 SWA701 DAL → AMA Jul 25, 12:20 UTCJul 25, 13:40 UTC1h 20m
2026-07-25 SWA701 DAL → AMA Jul 25, 12:20 UTCJul 25, 13:40 UTC1h 20m
2026-07-25 SWA185 ATL → LGA Jul 25, 06:05 UTCJul 25, 07:20 UTC1h 15m
2026-07-25 SWA3003 BWI → ALB Jul 25, 01:45 UTCJul 25, 05:00 UTC3h 15m
2026-07-24 SWA582 HOU → LGA Jul 24, 23:40 UTCJul 25, 00:25 UTC45m
2026-07-24 SWA3619 DEN → BOS Jul 24, 18:45 UTCJul 24, 22:25 UTC3h 40m
2026-07-24 SWA739 STL → LGA Jul 24, 15:15 UTCJul 24, 17:20 UTC2h 5m
2026-07-24 SWA2340 DEN → PHX Jul 24, 11:15 UTCJul 24, 13:40 UTC2h 25m
2026-07-24 SWA4587 CUN → AUS Jul 24, 04:25 UTCJul 24, 06:40 UTC2h 15m
2026-07-23 SWA1137 DCA → PVD Jul 23, 23:30 UTCJul 24, 03:35 UTC4h 5m
2026-07-23 SWA120 MCI → BWI Jul 23, 21:15 UTCJul 23, 22:20 UTC1h 5m
2026-07-23 SWA2719 BUR → PHX Jul 23, 17:35 UTCJul 23, 20:05 UTC2h 30m
2026-07-23 SWA3002 MHT → MDW Jul 23, 02:40 UTCJul 23, 16:15 UTC13h 35m
2026-07-22 SWA2054 BWI → BUF Jul 22, 21:50 UTCJul 22, 22:35 UTC45m
2026-07-22 SWA3216 RNO → OAK Jul 22, 19:05 UTCJul 22, 20:50 UTC1h 45m
2026-07-22 SWA623 LGB → SJC Jul 22, 15:55 UTCJul 22, 17:30 UTC1h 35m
2026-07-22 SWA623 LGB → SJC Jul 22, 15:52 UTCJul 22, 17:26 UTC1h 35m
2026-07-22 SWA3686 PHX → CMH Jul 22, 14:20 UTCJul 22, 14:30 UTC10m
2026-07-22 SWA3686 PHX → CMH Jul 22, 12:30 UTCJul 22, 14:30 UTC2h 0m
2026-07-22 SWA3686 PHX → CMH Jul 22, 12:26 UTCJul 22, 14:05 UTC1h 39m
2026-07-22 SWA1950 SNA → SMF Jul 22, 01:59 UTCJul 22, 03:40 UTC1h 41m
2026-07-22 SWA1950 SNA → SMF Jul 22, 02:00 UTCJul 22, 03:45 UTC1h 45m
2026-07-21 SWA2519 ALB → BWI Jul 21, 22:05 UTCJul 22, 00:35 UTC2h 30m
2026-07-21 SWA4271 - Jul 21, 18:50 UTCJul 21, 20:55 UTC2h 5m
2026-07-21 SWA2630 SAN → OAK Jul 21, 14:10 UTCJul 21, 17:30 UTC3h 20m
2026-07-21 SWA3022 ORD → DEN Jul 21, 10:10 UTCJul 21, 12:40 UTC2h 30m
2026-07-21 SWA3311 BWI → PWM Jul 21, 05:35 UTCJul 21, 07:50 UTC2h 15m
2026-07-21 SWA3311 BWI → PWM Jul 21, 05:35 UTCJul 21, 07:45 UTC2h 10m
2026-07-21 SWA1048 SNA → SJC Jul 21, 00:35 UTCJul 21, 03:05 UTC2h 30m
2026-07-20 SWA1048 SNA → SJC Jul 20, 18:20 UTCJul 20, 23:20 UTC5h 0m
2026-07-20 SWA4252 AUS → BWI Jul 20, 14:05 UTCJul 20, 17:00 UTC2h 55m
2026-07-20 SWA2594 MCO → AUS Jul 20, 10:50 UTCJul 20, 13:05 UTC2h 15m
2026-07-19 SWA3282 - Jul 19, 22:05 UTCJul 20, 00:25 UTC2h 20m
2026-07-19 SWA34 - Jul 19, 20:15 UTCJul 19, 20:55 UTC40m
2026-07-19 SWA510 BWI → MHT Jul 19, 17:30 UTCJul 19, 18:55 UTC1h 25m
2026-07-19 SWA1790 - Jul 19, 15:10 UTCJul 19, 16:35 UTC1h 25m
2026-07-19 SWA4052 - Jul 19, 03:05 UTCJul 19, 05:00 UTC1h 55m
2026-07-18 SWA1064 MCI → OAK Jul 18, 23:00 UTCJul 19, 00:35 UTC1h 35m

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 N8896L page for operator, model, and routing details .

Mode-S AC4279 frequently asked

What is Mode-S code AC4279?
AC4279 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N8896L.
Where is Mode-S AC4279 registered?
Mode-S code AC4279 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 AC4279 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 AC4279, octal 53041171, decimal 11,289,209.
What flights does AC4279 operate?
Mode-S AC4279 has broadcast 20 distinct callsigns, including SWA120, SWA3457, SWA2391, SWA4798, SWA4127.