Apparatus

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sensors Mode-S transponder

AC3AA8

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N8873S · BOEING 737 MAX 8 · operated by SOUTHWEST AIRLINES CO

Hex
AC3AA8
Octal
53035250
Decimal
11,287,208
Country
US
Tail
N8873S
Type
B38M
Broadcasting now · callsign SWA1459 · 18,250 ft
Flights observed
685
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:00 UTC

Current position

AC3AA8 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address AC3AA8 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
SWA200 Southwest Airlines 6 2026-04-17
SWA1045 - 6 2026-06-12
SWA823 Southwest Airlines 4 2026-06-06
SWA377 - 4 2026-07-11
SWA3591 Southwest Airlines 4 2026-05-26
SWA3516 Southwest Airlines 4 2026-04-30
SWA314 - 4 2026-07-15
SWA2820 Southwest Airlines 4 2026-06-16
SWA2291 Southwest Airlines 4 2026-05-23
SWA1941 Southwest Airlines 4 2026-06-10
SWA1121 Southwest Airlines 4 2026-07-20
SWA872 Southwest Airlines 3 2026-04-24
SWA8507 Southwest Airlines 3 2026-05-20
SWA781 - 3 2026-06-26
SWA661 Southwest Airlines 3 2026-05-22
SWA493 Southwest Airlines 3 2026-05-02
SWA4641 Southwest Airlines 3 2026-04-17
SWA4515 - 3 2026-07-06
SWA4512 Southwest Airlines 3 2026-04-13
SWA3895 Southwest Airlines 3 2026-05-24

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SWA1994 LAS → SJC Jul 26, 21:35 UTCJul 26, 22:00 UTC25m
2026-07-26 SWA1360 FLL → TPA Jul 26, 18:50 UTCJul 26, 20:25 UTC1h 35m
2026-07-26 SWA3042 OAK → GEG Jul 26, 15:30 UTCJul 26, 17:30 UTC2h 0m
2026-07-26 SWA4838 MCI → LAX Jul 26, 12:50 UTCJul 26, 14:20 UTC1h 30m
2026-07-26 SWA4838 MCI → LAX Jul 26, 12:49 UTCJul 26, 14:16 UTC1h 28m
2026-07-26 SWA643 LAS → LIH Jul 26, 04:20 UTCJul 26, 07:15 UTC2h 56m
2026-07-26 SWA643 LAS → LIH Jul 26, 04:15 UTCJul 26, 07:11 UTC2h 56m
2026-07-25 SWA924 PDX → LAS Jul 25, 23:50 UTCJul 26, 03:05 UTC3h 15m
2026-07-25 SWA924 PDX → LAS Jul 25, 23:46 UTCJul 26, 02:59 UTC3h 13m
2026-07-25 SWA1571 BWI → LGA Jul 25, 21:55 UTCJul 25, 22:40 UTC45m
2026-07-25 SWA1571 BWI → LGA Jul 25, 21:51 UTCJul 25, 22:36 UTC45m
2026-07-25 SWA3875 STL → AUS Jul 25, 17:50 UTCJul 25, 20:35 UTC2h 45m
2026-07-25 SWA3943 - Jul 25, 15:30 UTCJul 25, 16:10 UTC40m
2026-07-25 SWA1957 SJC → PDX Jul 25, 12:45 UTCJul 25, 14:35 UTC1h 50m
2026-07-25 SWA1957 SJC → PDX Jul 25, 12:39 UTCJul 25, 14:17 UTC1h 38m
2026-07-25 SWA2792 RSW → MKE Jul 25, 00:35 UTCJul 25, 02:20 UTC1h 45m
2026-07-25 SWA2792 RSW → MKE Jul 25, 00:31 UTCJul 25, 02:18 UTC1h 47m
2026-07-24 SWA4106 PHX → SEA Jul 24, 22:50 UTCJul 24, 23:20 UTC30m
2026-07-24 SWA4106 PHX → SEA Jul 24, 21:00 UTCJul 24, 22:45 UTC1h 45m
2026-07-24 SWA3690 STL → SMF Jul 24, 16:25 UTCJul 24, 19:45 UTC3h 20m
2026-07-24 SWA4156 BOS → DEN Jul 24, 10:40 UTCJul 24, 14:45 UTC4h 5m
2026-07-24 SWA4156 BOS → DEN Jul 24, 10:36 UTCJul 24, 14:36 UTC4h 1m
2026-07-24 SWA459 LAS → BWI Jul 24, 02:40 UTCJul 24, 04:50 UTC2h 10m
2026-07-23 SWA4344 LAS → SFO Jul 23, 23:40 UTCJul 24, 00:50 UTC1h 10m
2026-07-23 SWA4344 LAS → SFO Jul 23, 23:36 UTCJul 24, 00:45 UTC1h 9m
2026-07-23 SWA2577 MSY → LAX Jul 23, 21:15 UTCJul 23, 22:40 UTC1h 25m
2026-07-23 SWA3009 BNA → MYR Jul 23, 18:45 UTCJul 23, 20:15 UTC1h 30m
2026-07-23 SWA366 AUS → MSY Jul 23, 16:40 UTCJul 23, 18:00 UTC1h 20m
2026-07-23 SWA4149 DEN → SAT Jul 23, 13:45 UTCJul 23, 15:30 UTC1h 45m
2026-07-23 SWA4149 DEN → SAT Jul 23, 13:41 UTCJul 23, 15:30 UTC1h 49m
2026-07-23 SWA3418 BUR → LAS Jul 23, 10:50 UTCJul 23, 12:10 UTC1h 20m
2026-07-23 SWA3418 BUR → LAS Jul 23, 10:46 UTCJul 23, 12:05 UTC1h 19m
2026-07-23 SWA4431 BNA → RDU Jul 23, 01:10 UTCJul 23, 02:20 UTC1h 10m
2026-07-22 SWA642 TPA → AUS Jul 22, 21:25 UTCJul 22, 23:15 UTC1h 50m
2026-07-22 SWA2731 SJC → DEN Jul 22, 18:20 UTCJul 22, 20:30 UTC2h 10m
2026-07-22 SWA2731 SJC → DEN Jul 22, 15:55 UTCJul 22, 16:45 UTC50m
2026-07-22 SWA2731 SJC → DEN Jul 22, 13:10 UTCJul 22, 14:45 UTC1h 35m
2026-07-22 SWA2105 SJC → SNA Jul 22, 11:10 UTCJul 22, 11:30 UTC20m
2026-07-22 SWA3679 SJC → SEA Jul 22, 04:25 UTCJul 22, 05:25 UTC1h 0m
2026-07-22 SWA3679 SJC → SEA Jul 22, 04:22 UTCJul 22, 05:45 UTC1h 23m
2026-07-22 SWA2660 LGA → ATL Jul 22, 00:55 UTCJul 22, 03:25 UTC2h 30m
2026-07-21 SWA3120 OKC → MCO Jul 21, 21:00 UTCJul 21, 23:20 UTC2h 20m
2026-07-21 SWA2589 DEN → MCO Jul 21, 16:40 UTCJul 21, 17:55 UTC1h 15m
2026-07-21 SWA4059 TUS → DEN Jul 21, 13:50 UTCJul 21, 15:25 UTC1h 35m
2026-07-21 SWA4059 TUS → DEN Jul 21, 13:49 UTCJul 21, 15:17 UTC1h 28m
2026-07-21 SWA354 SAN → OAK Jul 21, 06:30 UTCJul 21, 07:25 UTC55m
2026-07-21 SWA354 SAN → OAK Jul 21, 02:20 UTCJul 21, 05:40 UTC3h 20m
2026-07-20 SWA492 AUS → OKC Jul 20, 23:05 UTCJul 21, 01:35 UTC2h 29m
2026-07-20 SWA1121 SJC → BUR Jul 20, 21:00 UTCJul 20, 21:35 UTC35m
2026-07-20 SWA1121 SJC → BUR Jul 20, 19:00 UTCJul 20, 21:35 UTC2h 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 N8873S page for operator, model, and routing details .

Mode-S AC3AA8 frequently asked

What is Mode-S code AC3AA8?
AC3AA8 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N8873S.
Where is Mode-S AC3AA8 registered?
Mode-S code AC3AA8 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 AC3AA8 broadcasting right now?
Yes. Mode-S AC3AA8 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AC3AA8, octal 53035250, decimal 11,287,208.
What flights does AC3AA8 operate?
Mode-S AC3AA8 has broadcast 20 distinct callsigns, including SWA200, SWA1045, SWA823, SWA377, SWA3591.