Apparatus

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sensors Mode-S transponder

AC48F2

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N8909L · BOEING 737 MAX 8 · operated by SOUTHWEST AIRLINES CO

Hex
AC48F2
Octal
53044362
Decimal
11,290,866
Country
US
Tail
N8909L
Type
B38M
No current signal · last broadcast Jul 26, 20:50 UTC
Flights observed
757
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 20:50 UTC

Last known position

Most recent position reported by Mode-S AC48F2.

Country allocation

The ICAO 24-bit address AC48F2 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
SWA3693 Southwest Airlines 5 2026-04-18
SWA2909 Southwest Airlines 5 2026-07-24
SWA1934 - 5 2026-06-21
SWA827 Southwest Airlines 4 2026-06-03
SWA647 - 4 2026-07-11
SWA4392 - 4 2026-07-10
SWA3931 - 4 2026-07-19
SWA2593 - 4 2026-06-20
SWA2348 - 4 2026-07-04
SWA2319 - 4 2026-07-17
SWA2147 Southwest Airlines 4 2026-07-19
SWA1994 - 4 2026-06-22
SWA1313 - 4 2026-06-14
SWA1108 - 4 2026-07-07
SWA823 - 3 2026-07-11
SWA591 Southwest Airlines 3 2026-06-07
SWA4957 Southwest Airlines 3 2026-06-12
SWA4607 Southwest Airlines 3 2026-06-12
SWA449 Southwest Airlines 3 2026-04-30
SWA4226 - 3 2026-07-18

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SWA3969 MCO → MEM Jul 26, 19:05 UTCJul 26, 20:50 UTC1h 45m
2026-07-26 SWA1356 BOS → BWI Jul 26, 16:15 UTCJul 26, 17:45 UTC1h 30m
2026-07-26 SWA2452 IND → TPA Jul 26, 14:00 UTCJul 26, 15:05 UTC1h 5m
2026-07-26 SWA1970 PDX → DEN Jul 26, 10:30 UTCJul 26, 12:20 UTC1h 50m
2026-07-26 SWA378 PHX → SDF Jul 26, 00:50 UTCJul 26, 02:35 UTC1h 45m
2026-07-26 SWA378 PHX → SDF Jul 26, 00:46 UTCJul 26, 02:43 UTC1h 57m
2026-07-25 SWA3496 DEN → MCO Jul 25, 21:45 UTCJul 25, 23:40 UTC1h 55m
2026-07-25 SWA3496 DEN → MCO Jul 25, 21:41 UTCJul 25, 23:35 UTC1h 55m
2026-07-25 SWA3496 DEN → MCO Jul 25, 19:15 UTCJul 25, 20:30 UTC1h 15m
2026-07-25 SWA334 LAS → PHX Jul 25, 16:55 UTCJul 25, 17:55 UTC1h 0m
2026-07-25 SWA334 LAS → PHX Jul 25, 16:50 UTCJul 25, 17:53 UTC1h 3m
2026-07-25 SWA3348 ATL → CMH Jul 25, 15:00 UTCJul 25, 15:50 UTC50m
2026-07-25 SWA3348 ATL → CMH Jul 25, 14:57 UTCJul 25, 15:46 UTC49m
2026-07-25 SWA3697 LAS → LAX Jul 25, 05:11 UTCJul 25, 06:46 UTC1h 36m
2026-07-25 SWA3697 LAS → LAX Jul 25, 05:15 UTCJul 25, 06:45 UTC1h 30m
2026-07-25 SWA3865 ATL → CMH Jul 25, 03:35 UTCJul 25, 04:30 UTC55m
2026-07-25 SWA3865 ATL → CMH Jul 25, 03:30 UTCJul 25, 04:30 UTC1h 0m
2026-07-25 SWA4267 MCO → MSY Jul 25, 01:00 UTCJul 25, 02:45 UTC1h 45m
2026-07-25 SWA4267 MCO → MSY Jul 25, 00:57 UTCJul 25, 02:40 UTC1h 43m
2026-07-24 SWA2909 AUS → MCO Jul 24, 22:50 UTCJul 25, 00:00 UTC1h 10m
2026-07-24 SWA1407 PHX → SFO Jul 24, 18:50 UTCJul 24, 21:50 UTC3h 0m
2026-07-24 SWA1407 PHX → SFO Jul 24, 18:48 UTCJul 24, 21:49 UTC3h 1m
2026-07-24 SWA4320 MDW → ATL Jul 24, 14:15 UTCJul 24, 17:05 UTC2h 50m
2026-07-24 SWA4320 MDW → ATL Jul 24, 14:14 UTCJul 24, 17:02 UTC2h 49m
2026-07-24 SWA744 BWI → SAT Jul 24, 03:30 UTCJul 24, 05:25 UTC1h 55m
2026-07-23 SWA3002 MHT → MDW Jul 23, 23:15 UTCJul 24, 01:55 UTC2h 40m
2026-07-23 SWA2107 SJC → BUR Jul 23, 20:50 UTCJul 23, 21:55 UTC1h 5m
2026-07-23 SWA2107 SJC → BUR Jul 23, 20:46 UTCJul 23, 21:55 UTC1h 10m
2026-07-23 SWA3186 DCA → PVD Jul 23, 16:50 UTCJul 23, 19:50 UTC3h 0m
2026-07-23 SWA3186 DCA → PVD Jul 23, 16:48 UTCJul 23, 19:49 UTC3h 1m
2026-07-23 SWA4673 SJC → SEA Jul 23, 12:35 UTCJul 23, 15:20 UTC2h 45m
2026-07-23 SWA22 DAL → AMA Jul 23, 00:10 UTCJul 23, 02:45 UTC2h 35m
2026-07-22 SWA19 PHX → DAL Jul 22, 21:15 UTCJul 22, 22:45 UTC1h 30m
2026-07-22 SWA21 BWI → ISP Jul 22, 18:45 UTCJul 22, 20:15 UTC1h 30m
2026-07-22 SWA21 BWI → ISP Jul 22, 18:40 UTCJul 22, 20:10 UTC1h 30m
2026-07-22 SWA1795 RSW → BDL Jul 22, 16:10 UTCJul 22, 17:40 UTC1h 30m
2026-07-22 SWA2932 SLC → DEN Jul 22, 13:50 UTCJul 22, 14:50 UTC1h 0m
2026-07-22 SWA2884 PHX → ABQ Jul 22, 02:45 UTCJul 22, 05:25 UTC2h 40m
2026-07-22 SWA2884 PHX → ABQ Jul 22, 02:43 UTCJul 22, 06:18 UTC3h 35m
2026-07-22 SWA4115 BWI → IND Jul 22, 00:05 UTCJul 22, 01:00 UTC55m
2026-07-21 SWA4643 MDW → MSP Jul 21, 22:05 UTCJul 21, 23:05 UTC1h 0m
2026-07-21 SWA4516 - Jul 21, 18:45 UTCJul 21, 20:55 UTC2h 10m
2026-07-21 SWA4442 LIH → LAX Jul 21, 16:25 UTCJul 21, 17:20 UTC55m
2026-07-21 SWA4442 LIH → LAX Jul 21, 16:21 UTCJul 21, 17:14 UTC53m
2026-07-21 SWA4009 DCA → MDW Jul 21, 12:45 UTCJul 21, 14:40 UTC1h 55m
2026-07-21 SWA4009 DCA → MDW Jul 21, 12:40 UTCJul 21, 14:37 UTC1h 57m
2026-07-21 SWA4929 BWI → LAX Jul 21, 09:40 UTCJul 21, 11:30 UTC1h 50m
2026-07-20 SWA3528 BUR → OAK Jul 20, 23:45 UTCJul 21, 04:05 UTC4h 20m
2026-07-20 SWA1139 AUS → FLL Jul 20, 16:10 UTCJul 20, 22:25 UTC6h 15m
2026-07-20 SWA2723 PHX → MDW Jul 20, 12:10 UTCJul 20, 15:10 UTC3h 0m

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 N8909L page for operator, model, and routing details .

Mode-S AC48F2 frequently asked

What is Mode-S code AC48F2?
AC48F2 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N8909L.
Where is Mode-S AC48F2 registered?
Mode-S code AC48F2 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 AC48F2 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 20:50 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AC48F2, octal 53044362, decimal 11,290,866.
What flights does AC48F2 operate?
Mode-S AC48F2 has broadcast 20 distinct callsigns, including SWA3693, SWA2909, SWA1934, SWA827, SWA647.