Apparatus

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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 Jul 26, 22:15 UTC
Flights observed
733
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:15 UTC

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
SWA2879 Southwest Airlines 6 2026-07-22
SWA2409 - 6 2026-06-18
SWA1995 - 6 2026-07-14
SWA372 Southwest Airlines 5 2026-05-28
SWA3263 Southwest Airlines 5 2026-04-20
SWA3098 Southwest Airlines 5 2026-07-18
SWA2274 - 5 2026-06-29
SWA2257 Southwest Airlines 5 2026-04-16
SWA998 - 4 2026-06-27
SWA597 - 4 2026-06-27
SWA4166 Southwest Airlines 4 2026-07-22
SWA4135 Southwest Airlines 4 2026-07-23
SWA3601 Southwest Airlines 4 2026-04-21
SWA3018 Southwest Airlines 4 2026-06-20
SWA2502 Southwest Airlines 4 2026-05-31
SWA2329 - 4 2026-07-17
SWA2247 Southwest Airlines 4 2026-05-31
SWA1933 - 4 2026-07-18
SWA1913 Southwest Airlines 4 2026-07-18
SWA1902 - 4 2026-07-17

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SWA2455 SLC → PHX Jul 26, 18:30 UTCJul 26, 22:10 UTC3h 40m
2026-07-26 SWA1966 TUS → HOU Jul 26, 15:05 UTCJul 26, 17:15 UTC2h 10m
2026-07-26 SWA1519 SJC → BUR Jul 26, 12:25 UTCJul 26, 14:00 UTC1h 35m
2026-07-26 SWA1519 SJC → BUR Jul 26, 12:24 UTCJul 26, 13:56 UTC1h 32m
2026-07-26 SWA1519 SJC → BUR Jul 26, 10:35 UTCJul 26, 11:25 UTC50m
2026-07-26 SWA4366 MHT → MCO Jul 26, 02:30 UTCJul 26, 03:10 UTC40m
2026-07-25 SWA1448 LAS → SJC Jul 25, 23:40 UTCJul 26, 01:10 UTC1h 30m
2026-07-25 SWA4988 MCI → MDW Jul 25, 21:05 UTCJul 25, 22:25 UTC1h 20m
2026-07-25 SWA4988 MCI → MDW Jul 25, 21:00 UTCJul 25, 22:28 UTC1h 28m
2026-07-25 SWA2083 PDX → SJC Jul 25, 19:05 UTCJul 25, 19:45 UTC40m
2026-07-25 SWA2083 PDX → SJC Jul 25, 19:01 UTCJul 25, 19:43 UTC42m
2026-07-25 SWA4795 PHX → RDU Jul 25, 16:15 UTCJul 25, 17:50 UTC1h 35m
2026-07-25 SWA4795 PHX → RDU Jul 25, 16:09 UTCJul 25, 17:50 UTC1h 41m
2026-07-25 SWA3796 HNL → OAK Jul 25, 13:50 UTCJul 25, 15:05 UTC1h 15m
2026-07-25 SWA3796 HNL → OAK Jul 25, 13:43 UTCJul 25, 15:05 UTC1h 22m
2026-07-25 SWA250 BOI → OAK Jul 25, 11:13 UTCJul 25, 12:36 UTC1h 23m
2026-07-25 SWA250 BOI → OAK Jul 25, 11:15 UTCJul 25, 12:30 UTC1h 15m
2026-07-25 SWA4878 SAN → HOU Jul 25, 06:30 UTCJul 25, 07:45 UTC1h 15m
2026-07-25 SWA4878 SAN → HOU Jul 25, 06:25 UTCJul 25, 07:44 UTC1h 19m
2026-07-25 SWA2581 MDW → PIT Jul 25, 03:30 UTCJul 25, 05:45 UTC2h 15m
2026-07-24 SWA3291 BNA → BOS Jul 24, 23:15 UTCJul 25, 01:30 UTC2h 15m
2026-07-24 SWA3291 BNA → BOS Jul 24, 23:15 UTCJul 25, 01:30 UTC2h 15m
2026-07-24 SWA1681 MHT → BWI Jul 24, 20:45 UTCJul 24, 22:05 UTC1h 20m
2026-07-24 SWA3774 SAT → ELP Jul 24, 17:25 UTCJul 24, 19:20 UTC1h 55m
2026-07-24 SWA3630 DEN → PHL Jul 24, 14:55 UTCJul 24, 16:20 UTC1h 25m
2026-07-24 SWA3630 DEN → PHL Jul 24, 14:50 UTCJul 24, 16:19 UTC1h 29m
2026-07-24 SWA4920 BUR → OAK Jul 24, 12:15 UTCJul 24, 13:30 UTC1h 15m
2026-07-24 SWA4920 BUR → OAK Jul 24, 12:10 UTCJul 24, 13:25 UTC1h 15m
2026-07-24 SWA3873 MDW → CHS Jul 24, 03:50 UTCJul 24, 04:55 UTC1h 5m
2026-07-24 SWA3834 SNA → SJC Jul 24, 01:50 UTCJul 24, 02:30 UTC40m
2026-07-24 SWA3834 SNA → SJC Jul 24, 01:50 UTCJul 24, 02:58 UTC1h 8m
2026-07-23 SWA4897 ORD → DAL Jul 23, 23:55 UTCJul 24, 00:55 UTC1h 0m
2026-07-23 SWA3061 AUS → PHX Jul 23, 22:20 UTCJul 23, 23:00 UTC40m
2026-07-23 SWA4278 DAL → RDU Jul 23, 20:00 UTCJul 23, 21:00 UTC1h 0m
2026-07-23 SWA4007 OAK → LAS Jul 23, 17:30 UTCJul 23, 18:35 UTC1h 5m
2026-07-23 SWA4135 SAN → SFO Jul 23, 14:35 UTCJul 23, 16:12 UTC1h 37m
2026-07-23 SWA4135 SAN → SFO Jul 23, 14:35 UTCJul 23, 16:15 UTC1h 40m
2026-07-23 SWA512 BWI → BUF Jul 23, 07:40 UTCJul 23, 12:25 UTC4h 45m
2026-07-22 SWA2879 MDW → ALB Jul 22, 18:45 UTCJul 23, 00:00 UTC5h 15m
2026-07-22 SWA4166 SJC → LAX Jul 22, 15:52 UTCJul 22, 16:49 UTC57m
2026-07-22 SWA4166 SJC → LAX Jul 22, 15:55 UTCJul 22, 17:00 UTC1h 5m
2026-07-22 SWA1393 SJC → AUS Jul 22, 11:25 UTCJul 22, 13:50 UTC2h 25m
2026-07-22 SWA3212 RSW → MDW Jul 22, 03:25 UTCJul 22, 03:35 UTC10m
2026-07-22 SWA3212 RSW → MDW Jul 22, 00:40 UTCJul 22, 03:20 UTC2h 40m
2026-07-21 SWA1938 SJC → AUS Jul 21, 22:05 UTCJul 21, 23:15 UTC1h 10m
2026-07-21 SWA1938 SJC → AUS Jul 21, 18:30 UTCJul 21, 18:50 UTC20m
2026-07-21 SWA2166 PVD → BWI Jul 21, 16:10 UTCJul 21, 16:30 UTC20m
2026-07-21 SWA2166 PVD → BWI Jul 21, 16:10 UTCJul 21, 16:38 UTC28m
2026-07-21 SWA3099 STL → BOS Jul 21, 00:05 UTCJul 21, 00:20 UTC15m
2026-07-20 SWA2138 BNA → PHL Jul 20, 16:40 UTCJul 20, 18:15 UTC1h 35m

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 Jul 26, 22:15 UTC.
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 SWA2879, SWA2409, SWA1995, SWA372, SWA3263.