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sensors Mode-S transponder

AC134A

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N8774Q · BOEING 737 MAX 8 · operated by SOUTHWEST AIRLINES CO

Hex
AC134A
Octal
53011512
Decimal
11,277,130
Country
US
Tail
N8774Q
Type
B38M
No current signal · last broadcast 2h ago
Flights observed
644
Distinct callsigns
20
Country
US
Last broadcast
2h ago

Last known position

Most recent position reported by Mode-S AC134A.

Country allocation

The ICAO 24-bit address AC134A 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
SWA2409 - 6 2026-06-18
SWA1995 - 6 2026-07-14
SWA372 Southwest Airlines 5 2026-05-28
SWA3263 Southwest Airlines 5 2026-04-20
SWA2879 Southwest Airlines 5 2026-06-16
SWA2274 - 5 2026-06-29
SWA2257 Southwest Airlines 5 2026-04-16
SWA998 - 4 2026-06-27
SWA597 - 4 2026-06-27
SWA3601 Southwest Airlines 4 2026-04-21
SWA3018 Southwest Airlines 4 2026-06-20
SWA2502 Southwest Airlines 4 2026-05-31
SWA2247 Southwest Airlines 4 2026-05-31
SWA1082 - 4 2026-07-05
SWA712 Southwest Airlines 3 2026-05-13
SWA4527 - 3 2026-07-11
SWA4437 Southwest Airlines 3 2026-05-09
SWA434 - 3 2026-06-20
SWA4107 - 3 2026-06-14
SWA3328 Southwest Airlines 3 2026-05-03

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 SWA1995 STL → CUN Jul 14, 16:25 UTCJul 14, 19:05 UTC2h 40m
2026-07-14 SWA3352 PHX → STL Jul 14, 12:10 UTCJul 14, 14:55 UTC2h 45m
2026-07-14 SWA2955 - Jul 14, 01:50 UTCJul 14, 04:50 UTC3h 0m
2026-07-14 SWA2955 MKE → PHX Jul 14, 01:50 UTCJul 14, 04:50 UTC3h 0m
2026-07-13 SWA1629 DEN → MKE Jul 13, 22:34 UTCJul 14, 00:34 UTC2h 0m
2026-07-13 SWA1629 DEN → MKE Jul 13, 22:35 UTCJul 14, 00:35 UTC2h 0m
2026-07-13 SWA4826 - Jul 13, 19:20 UTCJul 13, 21:20 UTC2h 0m
2026-07-13 SWA2246 - Jul 13, 14:45 UTCJul 13, 18:00 UTC3h 15m
2026-07-13 SWA1915 - Jul 13, 11:30 UTCJul 13, 12:35 UTC1h 5m
2026-07-13 SWA1915 - Jul 13, 07:10 UTCJul 13, 07:30 UTC20m
2026-07-12 SWA3274 - Jul 12, 17:01 UTCJul 12, 22:50 UTC5h 50m
2026-07-12 SWA2491 LGB → PHX Jul 12, 14:05 UTCJul 12, 15:10 UTC1h 5m
2026-07-11 SWA4971 - Jul 11, 22:25 UTCJul 12, 03:20 UTC4h 55m
2026-07-11 SWA4527 - Jul 11, 20:15 UTCJul 11, 20:30 UTC15m
2026-07-11 SWA4527 - Jul 11, 15:10 UTCJul 11, 15:55 UTC45m
2026-07-11 SWA4527 ONT → HNL Jul 11, 15:09 UTCJul 11, 20:29 UTC5h 20m
2026-07-11 SWA223 PHX → ONT Jul 11, 06:05 UTCJul 11, 06:50 UTC45m
2026-07-11 SWA2955 MKE → PHX Jul 11, 01:30 UTCJul 11, 04:45 UTC3h 15m
2026-07-10 SWA1629 - Jul 10, 22:40 UTCJul 11, 00:25 UTC1h 45m
2026-07-10 SWA4826 - Jul 10, 19:05 UTCJul 10, 21:25 UTC2h 20m
2026-07-10 SWA2246 LAS → IND Jul 10, 14:40 UTCJul 10, 17:45 UTC3h 5m
2026-07-10 SWA3106 DEN → LAS Jul 10, 11:55 UTCJul 10, 13:25 UTC1h 30m
2026-07-10 SWA4247 SJC → DEN Jul 10, 02:50 UTCJul 10, 04:40 UTC1h 50m
2026-07-09 SWA4994 - Jul 9, 21:20 UTCJul 10, 01:50 UTC4h 30m
2026-07-09 SWA2122 SJC → HNL Jul 9, 14:30 UTCJul 9, 19:43 UTC5h 13m
2026-07-09 SWA2122 - Jul 9, 14:30 UTCJul 9, 19:45 UTC5h 15m
2026-07-09 SWA3164 - Jul 9, 04:00 UTCJul 9, 04:50 UTC50m
2026-07-09 SWA3164 ONT → SJC Jul 9, 03:57 UTCJul 9, 04:48 UTC51m
2026-07-09 SWA588 SMF → ONT Jul 9, 02:05 UTCJul 9, 03:00 UTC55m
2026-07-09 SWA2316 - Jul 9, 00:05 UTCJul 9, 00:45 UTC40m
2026-07-08 SWA2316 KOA → SMF Jul 8, 20:03 UTCJul 9, 00:44 UTC4h 41m
2026-07-08 SWA2316 - Jul 8, 20:05 UTCJul 8, 20:15 UTC10m
2026-07-07 SWA4452 - Jul 7, 22:15 UTCJul 7, 22:20 UTC5m
2026-07-07 SWA4452 - Jul 7, 16:45 UTCJul 7, 17:45 UTC1h 0m
2026-07-07 SWA2970 - Jul 7, 14:10 UTCJul 7, 15:00 UTC50m
2026-07-07 SWA2356 - Jul 7, 11:10 UTCJul 7, 11:50 UTC40m
2026-07-07 SWA1931 - Jul 7, 00:30 UTCJul 7, 00:50 UTC20m
2026-07-06 SWA4109 - Jul 6, 21:55 UTCJul 6, 22:10 UTC15m
2026-07-06 SWA4109 - Jul 6, 16:30 UTCJul 6, 17:35 UTC1h 5m
2026-07-06 SWA3039 PHX → LAS Jul 6, 13:45 UTCJul 6, 14:30 UTC45m
2026-07-06 SWA643 BNA → PHX Jul 6, 04:20 UTCJul 6, 07:25 UTC3h 5m
2026-07-06 SWA1428 DCA → BNA Jul 6, 01:15 UTCJul 6, 02:50 UTC1h 35m
2026-07-05 SWA3515 - Jul 5, 22:15 UTCJul 5, 23:20 UTC1h 5m
2026-07-05 SWA4525 - Jul 5, 18:45 UTCJul 5, 20:45 UTC2h 0m
2026-07-05 SWA4525 BNA → PVD Jul 5, 18:45 UTCJul 5, 20:43 UTC1h 58m
2026-07-05 SWA2408 LGA → BNA Jul 5, 15:50 UTCJul 5, 17:40 UTC1h 50m
2026-07-05 SWA2408 LGA → BNA Jul 5, 15:49 UTCJul 5, 17:38 UTC1h 49m
2026-07-05 SWA2182 DAL → LGA Jul 5, 11:30 UTCJul 5, 14:30 UTC3h 0m
2026-07-05 SWA2182 DAL → LGA Jul 5, 11:30 UTCJul 5, 14:26 UTC2h 56m
2026-07-05 SWA1082 - Jul 5, 00:15 UTCJul 5, 01:40 UTC1h 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 N8774Q page for operator, model, and routing details .

Mode-S AC134A frequently asked

What is Mode-S code AC134A?
AC134A is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N8774Q.
Where is Mode-S AC134A registered?
Mode-S code AC134A 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 AC134A broadcasting right now?
No active broadcast right now. Last signal was 2h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AC134A, octal 53011512, decimal 11,277,130.
What flights does AC134A operate?
Mode-S AC134A has broadcast 20 distinct callsigns, including SWA2409, SWA1995, SWA372, SWA3263, SWA2879.