Apparatus

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sensors Mode-S transponder

AC24E4

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N8817L · BOEING 737 MAX 8 · operated by SOUTHWEST AIRLINES CO

Hex
AC24E4
Octal
53022344
Decimal
11,281,636
Country
US
Tail
N8817L
Type
B38M
No current signal · last broadcast Jul 26, 23:00 UTC
Flights observed
775
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 23:00 UTC

Last known position

Most recent position reported by Mode-S AC24E4.

Country allocation

The ICAO 24-bit address AC24E4 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
SWA2151 Southwest Airlines 6 2026-05-22
SWA1223 Southwest Airlines 6 2026-04-22
SWA4017 Southwest Airlines 5 2026-06-07
SWA2659 Southwest Airlines 5 2026-07-26
SWA2328 - 5 2026-07-02
SWA1092 Southwest Airlines 5 2026-05-11
SWA899 - 4 2026-06-23
SWA463 - 4 2026-07-15
SWA4574 Southwest Airlines 4 2026-05-21
SWA4519 - 4 2026-07-14
SWA393 - 4 2026-06-29
SWA3317 Southwest Airlines 4 2026-06-12
SWA3291 Southwest Airlines 4 2026-04-16
SWA2885 Southwest Airlines 4 2026-07-21
SWA2675 Southwest Airlines 4 2026-05-05
SWA1406 Southwest Airlines 4 2026-05-14
SWA1312 - 4 2026-07-06
SWA940 Southwest Airlines 3 2026-04-14
SWA597 Southwest Airlines 3 2026-06-09
SWA4744 Southwest Airlines 3 2026-06-28

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SWA2747 BOS → DEN Jul 26, 22:05 UTCJul 26, 23:00 UTC55m
2026-07-26 SWA2747 BOS → DEN Jul 26, 20:15 UTCJul 26, 21:00 UTC45m
2026-07-26 SWA1285 MEM → ATL Jul 26, 17:25 UTCJul 26, 18:30 UTC1h 5m
2026-07-26 SWA3166 SJC → SAN Jul 26, 15:05 UTCJul 26, 16:00 UTC55m
2026-07-26 SWA4879 MCI → MIA Jul 26, 13:05 UTCJul 26, 14:05 UTC1h 0m
2026-07-26 SWA2659 SLC → LGB Jul 26, 02:15 UTCJul 26, 06:10 UTC3h 55m
2026-07-26 SWA2659 SLC → LGB Jul 26, 02:12 UTCJul 26, 06:05 UTC3h 53m
2026-07-25 SWA3807 MDW → OAK Jul 25, 23:00 UTCJul 26, 00:50 UTC1h 50m
2026-07-25 SWA3807 MDW → OAK Jul 25, 22:58 UTCJul 26, 00:45 UTC1h 47m
2026-07-25 SWA2560 TPA → CMH Jul 25, 18:40 UTCJul 25, 21:30 UTC2h 50m
2026-07-25 SWA3145 ISP → BNA Jul 25, 15:25 UTCJul 25, 17:15 UTC1h 50m
2026-07-25 SWA3145 ISP → BNA Jul 25, 15:20 UTCJul 25, 17:09 UTC1h 49m
2026-07-25 SWA4879 MCI → MIA Jul 25, 13:15 UTCJul 25, 14:10 UTC55m
2026-07-25 SWA2500 SRQ → BWI Jul 25, 03:25 UTCJul 25, 04:10 UTC45m
2026-07-25 SWA2500 SRQ → BWI Jul 25, 03:20 UTCJul 25, 04:08 UTC48m
2026-07-25 SWA2876 MCO → BDL Jul 25, 01:20 UTCJul 25, 02:30 UTC1h 10m
2026-07-24 SWA2876 MCO → BDL Jul 24, 20:35 UTCJul 25, 00:10 UTC3h 35m
2026-07-24 SWA427 DCA → MSY Jul 24, 17:10 UTCJul 24, 19:10 UTC2h 0m
2026-07-24 SWA427 DCA → MSY Jul 24, 15:05 UTCJul 24, 15:55 UTC50m
2026-07-24 SWA3717 PDX → SJC Jul 24, 12:00 UTCJul 24, 13:55 UTC1h 55m
2026-07-24 SWA3717 PDX → SJC Jul 24, 10:10 UTCJul 24, 10:20 UTC10m
2026-07-24 SWA3717 PDX → SJC Jul 24, 10:07 UTCJul 24, 13:45 UTC3h 38m
2026-07-24 SWA2080 ABQ → DEN Jul 24, 04:35 UTCJul 24, 04:50 UTC15m
2026-07-24 SWA2080 ABQ → DEN Jul 24, 00:40 UTCJul 24, 03:00 UTC2h 20m
2026-07-24 SWA2080 ABQ → DEN Jul 24, 00:36 UTCJul 24, 04:44 UTC4h 8m
2026-07-23 SWA4654 LAX → LAS Jul 23, 21:05 UTCJul 23, 22:55 UTC1h 50m
2026-07-23 SWA1339 HOU → SJC Jul 23, 16:20 UTCJul 23, 19:00 UTC2h 40m
2026-07-23 SWA1339 HOU → SJC Jul 23, 16:20 UTCJul 23, 19:29 UTC3h 9m
2026-07-23 SWA3738 LAX → OAK Jul 23, 13:45 UTCJul 23, 14:45 UTC1h 0m
2026-07-23 SWA1737 HNL → OAK Jul 23, 06:35 UTCJul 23, 07:35 UTC1h 0m
2026-07-23 SWA2649 BWI → JAX Jul 23, 03:10 UTCJul 23, 05:05 UTC1h 55m
2026-07-23 SWA3088 DCA → DAL Jul 23, 01:15 UTCJul 23, 02:20 UTC1h 5m
2026-07-22 SWA3197 SEA → OAK Jul 22, 22:15 UTCJul 22, 23:40 UTC1h 25m
2026-07-22 SWA3197 SEA → OAK Jul 22, 22:10 UTCJul 22, 23:37 UTC1h 27m
2026-07-22 SWA3816 LAS → AUS Jul 22, 19:30 UTCJul 22, 21:00 UTC1h 30m
2026-07-22 SWA2504 SJC → LAS Jul 22, 17:25 UTCJul 22, 18:25 UTC1h 0m
2026-07-22 SWA2071 PHX → BUR Jul 22, 14:30 UTCJul 22, 16:25 UTC1h 55m
2026-07-22 SWA2071 PHX → BUR Jul 22, 14:28 UTCJul 22, 16:20 UTC1h 52m
2026-07-22 SWA4083 LAS → OAK Jul 22, 10:20 UTCJul 22, 13:05 UTC2h 45m
2026-07-22 SWA3810 SJC → AUS Jul 22, 00:25 UTCJul 22, 02:15 UTC1h 50m
2026-07-22 SWA3810 SJC → AUS Jul 22, 00:21 UTCJul 22, 02:17 UTC1h 56m
2026-07-21 SWA1285 MEM → ATL Jul 21, 20:40 UTCJul 21, 23:30 UTC2h 50m
2026-07-21 SWA1285 MEM → ATL Jul 21, 18:15 UTCJul 21, 19:20 UTC1h 5m
2026-07-21 SWA2885 OAK → LAS Jul 21, 15:25 UTCJul 21, 16:55 UTC1h 30m
2026-07-21 SWA2885 OAK → LAS Jul 21, 12:25 UTCJul 21, 14:10 UTC1h 45m
2026-07-21 SWA608 SFO → SAN Jul 21, 03:50 UTCJul 21, 05:10 UTC1h 20m
2026-07-21 SWA3025 - Jul 21, 01:25 UTCJul 21, 02:35 UTC1h 10m
2026-07-20 SWA4304 RSW → ALB Jul 20, 21:30 UTCJul 21, 00:15 UTC2h 44m
2026-07-20 SWA1770 BWI → CVG Jul 20, 18:40 UTCJul 20, 20:05 UTC1h 25m
2026-07-20 SWA1770 BWI → CVG Jul 20, 18:40 UTCJul 20, 20:00 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 N8817L page for operator, model, and routing details .

Mode-S AC24E4 frequently asked

What is Mode-S code AC24E4?
AC24E4 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N8817L.
Where is Mode-S AC24E4 registered?
Mode-S code AC24E4 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 AC24E4 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 23:00 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AC24E4, octal 53022344, decimal 11,281,636.
What flights does AC24E4 operate?
Mode-S AC24E4 has broadcast 20 distinct callsigns, including SWA2151, SWA1223, SWA4017, SWA2659, SWA2328.