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sensors Mode-S transponder

AC3A38

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N8870K · BOEING 737 MAX 8 · operated by SOUTHWEST AIRLINES CO

Hex
AC3A38
Octal
53035070
Decimal
11,287,096
Country
US
Tail
N8870K
Type
B38M
Broadcasting now · callsign SWA1813 · 31,000 ft
Flights observed
598
Distinct callsigns
20
Country
US
Last broadcast
32m ago

Current position

AC3A38 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address AC3A38 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
SWA1966 Southwest Airlines 7 2026-05-20
SWA1866 - 5 2026-06-19
SWA595 Southwest Airlines 4 2026-05-20
SWA4912 Southwest Airlines 4 2026-06-20
SWA379 - 4 2026-06-19
SWA3508 Southwest Airlines 4 2026-05-16
SWA2912 Southwest Airlines 4 2026-06-05
SWA2708 - 4 2026-07-01
SWA768 - 3 2026-06-29
SWA4850 Southwest Airlines 3 2026-06-06
SWA4762 Southwest Airlines 3 2026-06-26
SWA4481 - 3 2026-07-14
SWA4410 - 3 2026-07-13
SWA4314 Southwest Airlines 3 2026-05-20
SWA4289 Southwest Airlines 3 2026-04-17
SWA4242 Southwest Airlines 3 2026-04-13
SWA4020 Southwest Airlines 3 2026-05-29
SWA343 Southwest Airlines 3 2026-05-09
SWA3389 Southwest Airlines 3 2026-04-21
SWA3342 Southwest Airlines 3 2026-06-02

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 SWA1813 - Jul 14, 16:40 UTCJul 14, 18:00 UTC1h 20m
2026-07-14 SWA4481 - Jul 14, 13:40 UTCJul 14, 15:00 UTC1h 20m
2026-07-14 SWA4430 - Jul 14, 10:40 UTCJul 14, 12:30 UTC1h 50m
2026-07-14 SWA2338 BOS → BNA Jul 14, 01:40 UTCJul 14, 03:45 UTC2h 5m
2026-07-13 SWA4975 - Jul 13, 22:35 UTCJul 14, 00:30 UTC1h 55m
2026-07-13 SWA4066 PHX → MDW Jul 13, 18:20 UTCJul 13, 21:30 UTC3h 10m
2026-07-13 SWA4410 DAL → PHX Jul 13, 14:25 UTCJul 13, 16:25 UTC2h 0m
2026-07-13 SWA4410 DAL → PHX Jul 13, 14:25 UTCJul 13, 16:20 UTC1h 55m
2026-07-13 SWA1078 DEN → DAL Jul 13, 11:50 UTCJul 13, 13:20 UTC1h 30m
2026-07-13 SWA4620 TPA → DEN Jul 13, 05:10 UTCJul 13, 08:25 UTC3h 15m
2026-07-13 SWA702 - Jul 13, 00:50 UTCJul 13, 02:45 UTC1h 55m
2026-07-12 SWA2534 DAL → PIT Jul 12, 21:30 UTCJul 12, 23:45 UTC2h 15m
2026-07-12 SWA2534 DAL → PIT Jul 12, 21:26 UTCJul 12, 23:42 UTC2h 16m
2026-07-12 SWA4419 MSY → DAL Jul 12, 18:35 UTCJul 12, 20:15 UTC1h 40m
2026-07-12 SWA1678 LAS → MSY Jul 12, 14:05 UTCJul 12, 17:15 UTC3h 10m
2026-07-12 SWA1678 LAS → MSY Jul 12, 14:05 UTCJul 12, 17:06 UTC3h 1m
2026-07-12 SWA3509 SAN → LAS Jul 12, 03:30 UTCJul 12, 04:20 UTC50m
2026-07-12 SWA4521 ABQ → SAN Jul 12, 00:45 UTCJul 12, 02:10 UTC1h 25m
2026-07-12 SWA4521 ABQ → SAN Jul 12, 00:45 UTCJul 12, 02:08 UTC1h 24m
2026-07-11 SWA4944 DEN → ABQ Jul 11, 23:00 UTCJul 11, 23:50 UTC50m
2026-07-11 SWA721 - Jul 11, 19:35 UTCJul 11, 20:40 UTC1h 5m
2026-07-11 SWA2017 - Jul 11, 14:10 UTCJul 11, 16:10 UTC2h 0m
2026-07-11 SWA2017 SMF → SJD Jul 11, 14:06 UTCJul 11, 16:48 UTC2h 42m
2026-07-11 SWA4757 PHX → SMF Jul 11, 06:05 UTCJul 11, 07:35 UTC1h 30m
2026-07-11 SWA4757 PHX → SMF Jul 11, 06:05 UTCJul 11, 07:36 UTC1h 31m
2026-07-11 SWA4260 LAS → PHX Jul 11, 00:55 UTCJul 11, 04:30 UTC3h 35m
2026-07-10 SWA4143 AUS → LAS Jul 10, 21:15 UTCJul 10, 23:35 UTC2h 20m
2026-07-10 SWA1140 - Jul 10, 17:40 UTCJul 10, 19:50 UTC2h 10m
2026-07-10 SWA1140 CHS → AUS Jul 10, 17:38 UTCJul 10, 19:49 UTC2h 11m
2026-07-10 SWA469 - Jul 10, 15:30 UTCJul 10, 16:30 UTC1h 0m
2026-07-10 SWA3391 - Jul 10, 12:50 UTCJul 10, 14:00 UTC1h 10m
2026-07-10 SWA1388 - Jul 10, 02:00 UTCJul 10, 03:20 UTC1h 20m
2026-07-09 SWA107 - Jul 9, 22:40 UTCJul 10, 00:05 UTC1h 25m
2026-07-09 SWA4881 AUS → ABQ Jul 9, 20:10 UTCJul 9, 21:40 UTC1h 30m
2026-07-09 SWA4881 AUS → ABQ Jul 9, 20:10 UTCJul 9, 21:31 UTC1h 21m
2026-07-09 SWA2109 - Jul 9, 17:05 UTCJul 9, 19:05 UTC2h 0m
2026-07-09 SWA3877 - Jul 9, 15:15 UTCJul 9, 15:45 UTC30m
2026-07-09 SWA1270 ATL → MDW Jul 9, 12:15 UTCJul 9, 13:45 UTC1h 30m
2026-07-09 SWA1542 - Jul 9, 01:05 UTCJul 9, 02:45 UTC1h 40m
2026-07-08 SWA45 - Jul 8, 23:15 UTCJul 9, 00:00 UTC45m
2026-07-08 SWA45 DAL → HOU Jul 8, 23:14 UTCJul 9, 00:00 UTC47m
2026-07-08 SWA2530 - Jul 8, 20:00 UTCJul 8, 22:15 UTC2h 15m
2026-07-08 SWA4449 MCO → MSY Jul 8, 14:00 UTCJul 8, 17:10 UTC3h 10m
2026-07-08 SWA2553 - Jul 8, 01:30 UTCJul 8, 04:40 UTC3h 10m
2026-07-07 SWA653 BNA → RDU Jul 7, 21:15 UTCJul 7, 22:20 UTC1h 5m
2026-07-07 SWA4472 - Jul 7, 17:10 UTCJul 7, 19:15 UTC2h 5m
2026-07-07 SWA114 - Jul 7, 13:45 UTCJul 7, 16:05 UTC2h 20m
2026-07-07 SWA114 MCO → BDL Jul 7, 13:44 UTCJul 7, 16:00 UTC2h 16m
2026-07-07 SWA4483 - Jul 7, 10:10 UTCJul 7, 12:10 UTC2h 0m
2026-07-07 SWA4203 - Jul 7, 01:45 UTCJul 7, 03:50 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 N8870K page for operator, model, and routing details .

Mode-S AC3A38 frequently asked

What is Mode-S code AC3A38?
AC3A38 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N8870K.
Where is Mode-S AC3A38 registered?
Mode-S code AC3A38 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 AC3A38 broadcasting right now?
Yes. Mode-S AC3A38 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AC3A38, octal 53035070, decimal 11,287,096.
What flights does AC3A38 operate?
Mode-S AC3A38 has broadcast 20 distinct callsigns, including SWA1966, SWA1866, SWA595, SWA4912, SWA379.