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sensors Mode-S transponder

AC6A65

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N8999Q · BOEING 737 MAX 8 · operated by SOUTHWEST AIRLINES CO

Hex
AC6A65
Octal
53065145
Decimal
11,299,429
Country
US
Tail
N8999Q
Type
B38M
No current signal · last broadcast 4h ago
Flights observed
664
Distinct callsigns
20
Country
US
Last broadcast
4h ago

Last known position

Most recent position reported by Mode-S AC6A65.

Country allocation

The ICAO 24-bit address AC6A65 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
SWA4478 Southwest Airlines 4 2026-04-30
SWA4112 Southwest Airlines 4 2026-05-14
SWA3541 Southwest Airlines 4 2026-04-18
SWA1731 - 4 2026-07-14
SWA159 Southwest Airlines 4 2026-04-17
SWA878 Southwest Airlines 3 2026-04-16
SWA824 - 3 2026-07-11
SWA4212 - 3 2026-06-26
SWA4047 Southwest Airlines 3 2026-06-17
SWA3808 Southwest Airlines 3 2026-06-27
SWA3203 Southwest Airlines 3 2026-05-14
SWA3137 Southwest Airlines 3 2026-06-03
SWA2975 - 3 2026-07-10
SWA2964 Southwest Airlines 3 2026-06-15
SWA286 Southwest Airlines 3 2026-06-12
SWA2761 - 3 2026-07-01
SWA271 Southwest Airlines 3 2026-04-17
SWA2678 - 3 2026-07-02
SWA265 Southwest Airlines 3 2026-04-19
SWA2111 Southwest Airlines 3 2026-04-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-15 SWA372 - Jul 15, 04:05 UTCJul 15, 04:45 UTC40m
2026-07-15 SWA646 - Jul 15, 02:20 UTCJul 15, 03:15 UTC55m
2026-07-15 SWA646 SJC → ONT Jul 15, 02:17 UTCJul 15, 03:10 UTC53m
2026-07-15 SWA3540 - Jul 15, 00:25 UTCJul 15, 01:20 UTC55m
2026-07-14 SWA3754 SLC → SAN Jul 14, 21:55 UTCJul 14, 23:25 UTC1h 29m
2026-07-14 SWA1731 DEN → SLC Jul 14, 19:26 UTCJul 14, 20:21 UTC56m
2026-07-14 SWA1731 DEN → SLC Jul 14, 19:30 UTCJul 14, 20:25 UTC55m
2026-07-14 SWA2060 - Jul 14, 17:00 UTCJul 14, 18:05 UTC1h 5m
2026-07-14 SWA2060 - Jul 14, 13:30 UTCJul 14, 15:45 UTC2h 15m
2026-07-14 SWA4675 - Jul 14, 04:05 UTCJul 14, 06:50 UTC2h 45m
2026-07-14 SWA391 AUS → SAN Jul 14, 00:20 UTCJul 14, 02:45 UTC2h 25m
2026-07-13 SWA2476 LGB → AUS Jul 13, 19:45 UTCJul 13, 22:30 UTC2h 45m
2026-07-13 SWA1328 OAK → LGB Jul 13, 17:39 UTCJul 13, 18:45 UTC1h 6m
2026-07-13 SWA1328 OAK → LGB Jul 13, 17:40 UTCJul 13, 18:50 UTC1h 10m
2026-07-13 SWA3303 - Jul 13, 15:10 UTCJul 13, 16:40 UTC1h 30m
2026-07-13 SWA3303 PHX → OAK Jul 13, 15:11 UTCJul 13, 16:35 UTC1h 25m
2026-07-13 SWA3967 - Jul 13, 11:00 UTCJul 13, 13:35 UTC2h 35m
2026-07-13 SWA2081 MCO → STL Jul 13, 00:44 UTCJul 13, 02:46 UTC2h 2m
2026-07-13 SWA2081 MCO → STL Jul 13, 00:45 UTCJul 13, 02:45 UTC2h 0m
2026-07-12 SWA3247 - Jul 12, 21:20 UTCJul 12, 23:10 UTC1h 50m
2026-07-12 SWA3091 - Jul 12, 18:10 UTCJul 12, 19:15 UTC1h 5m
2026-07-12 SWA3091 MCO → CMH Jul 12, 18:08 UTCJul 12, 20:13 UTC2h 5m
2026-07-12 SWA3483 STL → MCO Jul 12, 14:30 UTCJul 12, 16:35 UTC2h 5m
2026-07-12 SWA3483 STL → MCO Jul 12, 14:30 UTCJul 12, 16:21 UTC1h 51m
2026-07-12 SWA679 - Jul 12, 11:45 UTCJul 12, 12:30 UTC45m
2026-07-12 SWA3480 - Jul 12, 06:15 UTCJul 12, 09:45 UTC3h 30m
2026-07-12 SWA233 SJC → SAN Jul 12, 04:06 UTCJul 12, 05:18 UTC1h 12m
2026-07-12 SWA148 - Jul 12, 00:10 UTCJul 12, 03:10 UTC3h 0m
2026-07-11 SWA148 - Jul 11, 21:40 UTCJul 11, 23:00 UTC1h 20m
2026-07-11 SWA824 - Jul 11, 16:40 UTCJul 11, 19:50 UTC3h 10m
2026-07-11 SWA824 LAS → BHM Jul 11, 16:38 UTCJul 11, 19:46 UTC3h 8m
2026-07-11 SWA824 SMF → LAS Jul 11, 14:25 UTCJul 11, 15:25 UTC1h 0m
2026-07-11 SWA3757 - Jul 11, 04:20 UTCJul 11, 05:40 UTC1h 20m
2026-07-11 SWA3757 SLC → SMF Jul 11, 04:19 UTCJul 11, 05:37 UTC1h 18m
2026-07-11 SWA1734 - Jul 11, 02:25 UTCJul 11, 03:25 UTC1h 0m
2026-07-10 SWA938 - Jul 10, 20:25 UTCJul 11, 00:55 UTC4h 30m
2026-07-10 SWA4388 - Jul 10, 17:30 UTCJul 10, 18:40 UTC1h 10m
2026-07-10 SWA4655 MCO → IND Jul 10, 14:30 UTCJul 10, 16:25 UTC1h 55m
2026-07-10 SWA4655 MCO → IND Jul 10, 14:26 UTCJul 10, 16:21 UTC1h 55m
2026-07-10 SWA440 - Jul 10, 12:00 UTCJul 10, 13:10 UTC1h 10m
2026-07-10 SWA1981 - Jul 10, 02:50 UTCJul 10, 05:10 UTC2h 20m
2026-07-10 SWA2975 - Jul 10, 00:00 UTCJul 10, 01:10 UTC1h 10m
2026-07-09 SWA2975 RNO → DEN Jul 9, 23:30 UTCJul 10, 01:08 UTC1h 38m
2026-07-09 SWA2975 - Jul 9, 20:10 UTCJul 9, 21:05 UTC55m
2026-07-09 SWA3746 - Jul 9, 17:25 UTCJul 9, 18:55 UTC1h 30m
2026-07-09 SWA3827 - Jul 9, 15:15 UTCJul 9, 16:25 UTC1h 10m
2026-07-09 SWA3165 - Jul 9, 13:10 UTCJul 9, 14:10 UTC1h 0m
2026-07-09 SWA449 OAK → ONT Jul 9, 04:40 UTCJul 9, 05:35 UTC55m
2026-07-09 SWA1164 DAL → OAK Jul 9, 00:20 UTCJul 9, 03:30 UTC3h 10m
2026-07-09 SWA1164 DAL → OAK Jul 9, 00:16 UTCJul 9, 03:18 UTC3h 3m

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 N8999Q page for operator, model, and routing details .

Mode-S AC6A65 frequently asked

What is Mode-S code AC6A65?
AC6A65 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N8999Q.
Where is Mode-S AC6A65 registered?
Mode-S code AC6A65 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 AC6A65 broadcasting right now?
No active broadcast right now. Last signal was 4h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AC6A65, octal 53065145, decimal 11,299,429.
What flights does AC6A65 operate?
Mode-S AC6A65 has broadcast 20 distinct callsigns, including SWA4478, SWA4112, SWA3541, SWA1731, SWA159.