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sensors Mode-S transponder

AC249E

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N8815L · BOEING 737 MAX 8 · operated by SOUTHWEST AIRLINES CO

Hex
AC249E
Octal
53022236
Decimal
11,281,566
Country
US
Tail
N8815L
Type
B38M
No current signal · last broadcast Jul 26, 21:30 UTC
Flights observed
754
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:30 UTC

Last known position

Most recent position reported by Mode-S AC249E.

Country allocation

The ICAO 24-bit address AC249E 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
SWA36 - 6 2026-07-04
SWA738 Southwest Airlines 5 2026-07-21
SWA2653 - 5 2026-06-20
SWA992 - 4 2026-06-19
SWA3378 Southwest Airlines 4 2026-04-18
SWA2675 Southwest Airlines 4 2026-05-12
SWA2325 Southwest Airlines 4 2026-07-24
SWA2096 - 4 2026-07-18
SWA2004 Southwest Airlines 4 2026-05-02
SWA1797 Southwest Airlines 4 2026-06-04
SWA1644 Southwest Airlines 4 2026-04-29
SWA155 - 4 2026-06-28
SWA147 - 4 2026-07-18
SWA107 Southwest Airlines 4 2026-06-01
SWA982 - 3 2026-06-27
SWA843 Southwest Airlines 3 2026-05-05
SWA586 - 3 2026-07-03
SWA552 - 3 2026-07-08
SWA479 Southwest Airlines 3 2026-04-30
SWA4747 - 3 2026-07-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SWA389 MSP → BWI Jul 26, 19:20 UTCJul 26, 21:30 UTC2h 10m
2026-07-26 SWA1741 PHX → ONT Jul 26, 15:45 UTCJul 26, 17:51 UTC2h 6m
2026-07-26 SWA1741 PHX → ONT Jul 26, 15:45 UTCJul 26, 17:55 UTC2h 10m
2026-07-26 SWA3961 IND → MCO Jul 26, 13:40 UTCJul 26, 14:50 UTC1h 10m
2026-07-26 SWA3961 IND → MCO Jul 26, 13:36 UTCJul 26, 14:48 UTC1h 12m
2026-07-26 SWA449 MKE → DEN Jul 26, 00:45 UTCJul 26, 02:30 UTC1h 45m
2026-07-25 SWA542 BNA → PHL Jul 25, 20:25 UTCJul 25, 21:45 UTC1h 20m
2026-07-25 SWA4472 MSY → TPA Jul 25, 17:00 UTCJul 25, 18:55 UTC1h 55m
2026-07-25 SWA427 DCA → MSY Jul 25, 15:10 UTCJul 25, 16:00 UTC50m
2026-07-25 SWA427 DCA → MSY Jul 25, 15:05 UTCJul 25, 15:55 UTC50m
2026-07-25 SWA3717 PDX → SJC Jul 25, 11:05 UTCJul 25, 13:00 UTC1h 55m
2026-07-25 SWA3717 PDX → SJC Jul 25, 09:20 UTCJul 25, 09:30 UTC10m
2026-07-25 SWA3717 PDX → SJC Jul 25, 09:17 UTCJul 25, 12:56 UTC3h 39m
2026-07-25 SWA4047 LIH → OAK Jul 25, 05:15 UTCJul 25, 05:25 UTC10m
2026-07-25 SWA4047 LIH → OAK Jul 25, 02:40 UTCJul 25, 05:20 UTC2h 40m
2026-07-25 SWA4047 LIH → OAK Jul 25, 02:45 UTCJul 25, 03:40 UTC55m
2026-07-25 SWA245 DSM → DEN Jul 25, 01:05 UTCJul 25, 01:10 UTC5m
2026-07-24 SWA245 DSM → DEN Jul 24, 23:40 UTCJul 25, 01:10 UTC1h 30m
2026-07-24 SWA245 DSM → DEN Jul 24, 23:39 UTCJul 25, 00:46 UTC1h 7m
2026-07-24 SWA4949 DAL → MIA Jul 24, 21:40 UTCJul 24, 22:45 UTC1h 5m
2026-07-24 SWA2325 SNA → OAK Jul 24, 16:28 UTCJul 24, 19:48 UTC3h 20m
2026-07-24 SWA2325 SNA → OAK Jul 24, 16:30 UTCJul 24, 19:50 UTC3h 20m
2026-07-24 SWA2325 SNA → OAK Jul 24, 14:45 UTCJul 24, 15:30 UTC45m
2026-07-24 SWA2325 SNA → OAK Jul 24, 12:20 UTCJul 24, 13:25 UTC1h 5m
2026-07-24 SWA4042 OMA → PHX Jul 24, 03:15 UTCJul 24, 07:15 UTC4h 0m
2026-07-24 SWA4042 OMA → PHX Jul 24, 03:14 UTCJul 24, 07:07 UTC3h 53m
2026-07-24 SWA428 LAS → BUR Jul 24, 00:10 UTCJul 24, 02:05 UTC1h 55m
2026-07-24 SWA428 LAS → BUR Jul 24, 00:07 UTCJul 24, 02:06 UTC1h 59m
2026-07-23 SWA428 LAS → BUR Jul 23, 22:20 UTCJul 23, 23:05 UTC45m
2026-07-23 SWA204 PIT → STL Jul 23, 19:40 UTCJul 23, 21:05 UTC1h 25m
2026-07-23 SWA862 MIA → AUS Jul 23, 17:00 UTCJul 23, 18:20 UTC1h 20m
2026-07-23 SWA1281 OAK → OGG Jul 23, 12:35 UTCJul 23, 15:10 UTC2h 35m
2026-07-23 SWA1281 OAK → OGG Jul 23, 12:34 UTCJul 23, 15:01 UTC2h 27m
2026-07-23 SWA2445 BWI → TPA Jul 23, 10:40 UTCJul 23, 11:30 UTC50m
2026-07-23 SWA2445 BWI → TPA Jul 23, 10:39 UTCJul 23, 11:30 UTC51m
2026-07-23 SWA4789 LAS → SMF Jul 23, 04:10 UTCJul 23, 04:50 UTC40m
2026-07-22 SWA1404 SAN → SJC Jul 22, 23:25 UTCJul 23, 03:00 UTC3h 35m
2026-07-22 SWA1404 SAN → SJC Jul 22, 20:05 UTCJul 22, 21:40 UTC1h 35m
2026-07-22 SWA8505 OAK → SFO Jul 22, 16:10 UTCJul 22, 17:40 UTC1h 30m
2026-07-22 SWA1671 DEN → PDX Jul 22, 03:15 UTCJul 22, 05:25 UTC2h 10m
2026-07-21 SWA3568 MDW → ATL Jul 21, 23:45 UTCJul 22, 01:30 UTC1h 45m
2026-07-21 SWA738 SAN → SJC Jul 21, 15:30 UTCJul 21, 16:15 UTC45m
2026-07-21 SWA738 SAN → SJC Jul 21, 12:20 UTCJul 21, 14:30 UTC2h 10m
2026-07-20 SWA3271 BWI → PWM Jul 20, 21:45 UTCJul 20, 23:35 UTC1h 50m
2026-07-20 SWA3271 BWI → PWM Jul 20, 21:43 UTCJul 20, 23:29 UTC1h 46m
2026-07-20 SWA3258 - Jul 20, 16:05 UTCJul 20, 19:20 UTC3h 15m
2026-07-20 SWA4197 BWI → MDW Jul 20, 11:25 UTCJul 20, 14:30 UTC3h 5m
2026-07-20 SWA3300 MDW → MEM Jul 20, 03:40 UTCJul 20, 06:45 UTC3h 5m
2026-07-19 SWA642 - Jul 19, 23:45 UTCJul 20, 02:40 UTC2h 55m
2026-07-19 SWA1736 - Jul 19, 13:05 UTCJul 19, 21:30 UTC8h 25m

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 N8815L page for operator, model, and routing details .

Mode-S AC249E frequently asked

What is Mode-S code AC249E?
AC249E is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N8815L.
Where is Mode-S AC249E registered?
Mode-S code AC249E 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 AC249E broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:30 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AC249E, octal 53022236, decimal 11,281,566.
What flights does AC249E operate?
Mode-S AC249E has broadcast 20 distinct callsigns, including SWA36, SWA738, SWA2653, SWA992, SWA3378.