Apparatus

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sensors Mode-S transponder

AC1301

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N8772M · BOEING 737 MAX 8 · operated by SOUTHWEST AIRLINES CO

Hex
AC1301
Octal
53011401
Decimal
11,277,057
Country
US
Tail
N8772M
Type
B38M
No current signal · last broadcast Jul 26, 22:15 UTC
Flights observed
687
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:15 UTC

Last known position

Most recent position reported by Mode-S AC1301.

Country allocation

The ICAO 24-bit address AC1301 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
SWA1915 - 7 2026-07-05
SWA2707 Southwest Airlines 6 2026-07-24
SWA1914 - 6 2026-07-10
SWA1851 - 6 2026-07-16
SWA1670 Southwest Airlines 6 2026-06-16
SWA4452 - 5 2026-07-04
SWA3094 - 5 2026-07-16
SWA3093 - 5 2026-07-09
SWA2316 - 5 2026-07-03
SWA1927 - 5 2026-06-27
SWA1713 - 5 2026-06-25
SWA609 Southwest Airlines 4 2026-04-16
SWA365 - 4 2026-07-03
SWA3274 - 4 2026-06-17
SWA3092 - 4 2026-06-27
SWA2170 - 4 2026-06-28
SWA2150 - 4 2026-06-27
SWA2122 - 4 2026-06-16
SWA1931 - 4 2026-07-17
SWA1919 - 4 2026-07-16

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SWA4259 PHX → OKC Jul 26, 20:35 UTCJul 26, 22:15 UTC1h 40m
2026-07-26 SWA4178 DEN → SEA Jul 26, 17:10 UTCJul 26, 19:00 UTC1h 50m
2026-07-26 SWA2689 LGA → MDW Jul 26, 14:04 UTCJul 26, 15:53 UTC1h 49m
2026-07-26 SWA2689 LGA → MDW Jul 26, 14:05 UTCJul 26, 14:15 UTC10m
2026-07-26 SWA1576 SJC → SNA Jul 26, 02:10 UTCJul 26, 05:30 UTC3h 20m
2026-07-25 SWA2653 BNA → BOS Jul 25, 23:20 UTCJul 26, 00:45 UTC1h 25m
2026-07-25 SWA2653 BNA → BOS Jul 25, 23:19 UTCJul 26, 00:44 UTC1h 25m
2026-07-25 SWA2789 ONT → OAK Jul 25, 19:25 UTCJul 25, 22:20 UTC2h 55m
2026-07-25 SWA2789 ONT → OAK Jul 25, 19:22 UTCJul 25, 22:21 UTC2h 59m
2026-07-25 SWA2789 ONT → OAK Jul 25, 17:10 UTCJul 25, 18:05 UTC55m
2026-07-25 SWA1660 SLC → DEN Jul 25, 14:15 UTCJul 25, 16:00 UTC1h 45m
2026-07-25 SWA4018 LGB → SJC Jul 25, 09:30 UTCJul 25, 12:45 UTC3h 15m
2026-07-25 SWA4018 LGB → SJC Jul 25, 09:29 UTCJul 25, 12:41 UTC3h 12m
2026-07-25 SWA4578 BWI → AUS Jul 25, 01:40 UTCJul 25, 03:40 UTC2h 0m
2026-07-25 SWA4578 BWI → AUS Jul 25, 01:39 UTCJul 25, 03:31 UTC1h 52m
2026-07-24 SWA905 MBJ → BWI Jul 24, 21:45 UTCJul 24, 22:15 UTC30m
2026-07-24 SWA905 MBJ → BWI Jul 24, 20:40 UTCJul 24, 23:41 UTC3h 2m
2026-07-24 SWA1115 HOU → MBJ Jul 24, 16:35 UTCJul 24, 18:30 UTC1h 55m
2026-07-24 SWA1115 HOU → MBJ Jul 24, 16:32 UTCJul 24, 19:22 UTC2h 50m
2026-07-24 SWA2442 MCO → ORD Jul 24, 11:10 UTCJul 24, 15:10 UTC4h 0m
2026-07-24 SWA2707 DEN → IND Jul 24, 03:50 UTCJul 24, 04:10 UTC20m
2026-07-24 SWA2707 DEN → IND Jul 24, 01:40 UTCJul 24, 02:15 UTC35m
2026-07-24 SWA2707 DEN → IND Jul 24, 01:35 UTCJul 24, 04:09 UTC2h 34m
2026-07-23 SWA4558 LAX → SJC Jul 23, 23:00 UTCJul 24, 00:00 UTC1h 0m
2026-07-23 SWA4592 LAS → SJC Jul 23, 20:20 UTCJul 23, 21:40 UTC1h 20m
2026-07-23 SWA4592 LAS → SJC Jul 23, 20:15 UTCJul 23, 21:35 UTC1h 20m
2026-07-23 SWA2271 SJC → SNA Jul 23, 15:45 UTCJul 23, 18:55 UTC3h 10m
2026-07-23 SWA2271 SJC → SNA Jul 23, 15:44 UTCJul 23, 18:44 UTC3h 0m
2026-07-23 SWA3150 SJC → DEN Jul 23, 12:50 UTCJul 23, 13:35 UTC45m
2026-07-23 SWA3150 SJC → DEN Jul 23, 12:49 UTCJul 23, 13:29 UTC40m
2026-07-23 SWA3313 BWI → BOS Jul 23, 05:35 UTCJul 23, 06:25 UTC50m
2026-07-23 SWA489 SEA → OAK Jul 23, 02:25 UTCJul 23, 04:10 UTC1h 45m
2026-07-23 SWA489 SEA → OAK Jul 23, 02:20 UTCJul 23, 04:13 UTC1h 53m
2026-07-23 SWA2255 LAS → BWI Jul 23, 00:10 UTCJul 23, 01:20 UTC1h 10m
2026-07-22 SWA4396 MHT → BWI Jul 22, 21:21 UTCJul 22, 22:35 UTC1h 14m
2026-07-22 SWA4396 MHT → BWI Jul 22, 21:25 UTCJul 22, 22:25 UTC1h 0m
2026-07-22 SWA2218 BUR → SJC Jul 22, 17:45 UTCJul 22, 20:05 UTC2h 20m
2026-07-22 SWA2218 BUR → SJC Jul 22, 17:42 UTCJul 22, 20:02 UTC2h 21m
2026-07-22 SWA2374 OAK → LAS Jul 22, 15:10 UTCJul 22, 16:20 UTC1h 10m
2026-07-22 SWA3046 LAS → ORD Jul 22, 13:05 UTCJul 22, 13:55 UTC50m
2026-07-22 SWA3046 LAS → ORD Jul 22, 13:02 UTCJul 22, 13:54 UTC52m
2026-07-22 SWA3696 LAX → SJC Jul 22, 02:25 UTCJul 22, 03:55 UTC1h 30m
2026-07-21 SWA399 SAN → OAK Jul 21, 21:40 UTCJul 22, 00:50 UTC3h 10m
2026-07-21 SWA2834 DAL → DEN Jul 21, 17:40 UTCJul 21, 19:50 UTC2h 10m
2026-07-21 SWA2834 DAL → DEN Jul 21, 17:39 UTCJul 21, 19:48 UTC2h 9m
2026-07-21 SWA2588 ONT → LAS Jul 21, 14:20 UTCJul 21, 16:10 UTC1h 50m
2026-07-21 SWA173 CVG → MDW Jul 21, 07:30 UTCJul 21, 12:25 UTC4h 55m
2026-07-21 SWA2811 DEN → BUF Jul 21, 01:15 UTCJul 21, 06:05 UTC4h 50m
2026-07-20 SWA4105 LAS → DEN Jul 20, 20:54 UTCJul 20, 22:56 UTC2h 2m
2026-07-20 SWA4105 LAS → DEN Jul 20, 20:55 UTCJul 20, 23:00 UTC2h 5m

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 N8772M page for operator, model, and routing details .

Mode-S AC1301 frequently asked

What is Mode-S code AC1301?
AC1301 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N8772M.
Where is Mode-S AC1301 registered?
Mode-S code AC1301 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 AC1301 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 AC1301, octal 53011401, decimal 11,277,057.
What flights does AC1301 operate?
Mode-S AC1301 has broadcast 20 distinct callsigns, including SWA1915, SWA2707, SWA1914, SWA1851, SWA1670.