Apparatus

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sensors Mode-S transponder

ABB8A0

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N8540V · BOEING 737-800 · operated by SOUTHWEST AIRLINES CO

Hex
ABB8A0
Octal
52734240
Decimal
11,253,920
Country
US
Tail
N8540V
Type
B738
No current signal · last broadcast Jul 26, 21:15 UTC
Flights observed
502
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:15 UTC

Last known position

Most recent position reported by Mode-S ABB8A0.

Country allocation

The ICAO 24-bit address ABB8A0 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
SWA573 Southwest Airlines 5 2026-05-04
SWA3630 - 5 2026-07-09
SWA805 Southwest Airlines 4 2026-04-29
SWA4136 - 4 2026-06-30
SWA239 - 4 2026-06-20
SWA1624 - 4 2026-07-04
SWA1370 Southwest Airlines 4 2026-06-16
SWA865 Southwest Airlines 3 2026-04-14
SWA560 - 3 2026-06-22
SWA557 - 3 2026-04-13
SWA478 - 3 2026-07-07
SWA477 - 3 2026-06-27
SWA470 Southwest Airlines 3 2026-06-14
SWA4537 Southwest Airlines 3 2026-06-22
SWA446 Southwest Airlines 3 2026-06-12
SWA4392 Southwest Airlines 3 2026-06-25
SWA392 - 3 2026-07-17
SWA3793 Southwest Airlines 3 2026-04-16
SWA3668 - 3 2026-07-12
SWA3525 Southwest Airlines 3 2026-06-10

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SWA2389 SJC → SNA Jul 26, 18:35 UTCJul 26, 21:15 UTC2h 40m
2026-07-26 SWA3372 SJC → LAS Jul 26, 13:35 UTCJul 26, 17:05 UTC3h 30m
2026-07-26 SWA874 PHX → SFO Jul 26, 10:25 UTCJul 26, 11:45 UTC1h 20m
2026-07-26 SWA874 PHX → SFO Jul 26, 10:25 UTCJul 26, 11:47 UTC1h 22m
2026-07-26 SWA749 BNA → ORD Jul 26, 01:25 UTCJul 26, 02:25 UTC1h 0m
2026-07-25 SWA3892 SAN → SJC Jul 25, 22:20 UTCJul 26, 00:30 UTC2h 10m
2026-07-25 SWA1790 MHT → BWI Jul 25, 19:40 UTCJul 25, 21:15 UTC1h 35m
2026-07-25 SWA2176 PSP → OAK Jul 25, 17:10 UTCJul 25, 18:10 UTC1h 0m
2026-07-25 SWA2176 PSP → OAK Jul 25, 17:09 UTCJul 25, 18:03 UTC54m
2026-07-25 SWA3461 SAN → HOU Jul 25, 14:15 UTCJul 25, 15:55 UTC1h 40m
2026-07-25 SWA3838 PHX → OAK Jul 25, 11:10 UTCJul 25, 13:20 UTC2h 10m
2026-07-25 SWA3613 HOU → ONT Jul 25, 04:55 UTCJul 25, 09:00 UTC4h 5m
2026-07-25 SWA1192 BUR → OAK Jul 25, 00:45 UTCJul 25, 02:40 UTC1h 55m
2026-07-24 SWA1192 BUR → OAK Jul 24, 19:40 UTCJul 24, 23:25 UTC3h 45m
2026-07-24 SWA2212 LAX → SJC Jul 24, 15:00 UTCJul 24, 18:30 UTC3h 30m
2026-07-24 SWA1318 SAN → OAK Jul 24, 11:35 UTCJul 24, 13:45 UTC2h 10m
2026-07-24 SWA2388 BUR → SJC Jul 24, 01:15 UTCJul 24, 04:10 UTC2h 55m
2026-07-23 SWA2388 BUR → SJC Jul 23, 23:05 UTCJul 24, 00:00 UTC55m
2026-07-23 SWA3304 SJC → PHX Jul 23, 19:40 UTCJul 23, 21:50 UTC2h 10m
2026-07-23 SWA126 - Jul 23, 16:45 UTCJul 23, 18:30 UTC1h 45m
2026-07-23 SWA4943 GEG → PHX Jul 23, 14:00 UTCJul 23, 15:25 UTC1h 25m
2026-07-23 SWA4943 GEG → PHX Jul 23, 13:56 UTCJul 23, 15:24 UTC1h 28m
2026-07-23 SWA332 MCO → MDW Jul 23, 10:20 UTCJul 23, 12:55 UTC2h 35m
2026-07-23 SWA4011 SJC → SEA Jul 23, 04:40 UTCJul 23, 07:50 UTC3h 10m
2026-07-23 SWA4011 SJC → SEA Jul 23, 04:37 UTCJul 23, 07:43 UTC3h 6m
2026-07-23 SWA399 SAN → OAK Jul 23, 00:35 UTCJul 23, 03:40 UTC3h 5m
2026-07-22 SWA3609 SYR → MCO Jul 22, 20:00 UTCJul 22, 23:05 UTC3h 5m
2026-07-22 SWA4454 - Jul 22, 17:30 UTCJul 22, 18:30 UTC1h 0m
2026-07-22 SWA2007 OAK → ONT Jul 22, 13:40 UTCJul 22, 16:30 UTC2h 50m
2026-07-22 SWA2007 OAK → ONT Jul 22, 11:10 UTCJul 22, 12:15 UTC1h 5m
2026-07-22 SWA438 ATL → LAS Jul 22, 01:25 UTCJul 22, 03:10 UTC1h 45m
2026-07-21 SWA2561 MDW → LGA Jul 21, 21:55 UTCJul 22, 00:20 UTC2h 25m
2026-07-21 SWA2718 STL → MIA Jul 21, 18:10 UTCJul 21, 20:20 UTC2h 10m
2026-07-21 SWA2718 STL → MIA Jul 21, 18:05 UTCJul 21, 20:19 UTC2h 15m
2026-07-21 SWA1411 LGB → OAK Jul 21, 15:50 UTCJul 21, 17:10 UTC1h 20m
2026-07-21 SWA1787 MDW → BOS Jul 21, 12:10 UTCJul 21, 13:40 UTC1h 30m
2026-07-21 SWA4379 SAN → PHX Jul 21, 02:05 UTCJul 21, 04:35 UTC2h 30m
2026-07-21 SWA4379 SAN → PHX Jul 21, 02:02 UTCJul 21, 04:35 UTC2h 33m
2026-07-20 SWA2479 SJC → SEA Jul 20, 22:10 UTCJul 21, 00:20 UTC2h 9m
2026-07-20 SWA2479 SJC → SEA Jul 20, 22:10 UTCJul 21, 00:08 UTC1h 59m
2026-07-20 SWA4915 AUS → LGB Jul 20, 18:30 UTCJul 20, 21:05 UTC2h 35m
2026-07-20 SWA1178 - Jul 20, 15:00 UTCJul 20, 17:15 UTC2h 15m
2026-07-20 SWA4093 - Jul 20, 13:00 UTCJul 20, 13:45 UTC45m
2026-07-20 SWA3288 - Jul 20, 09:30 UTCJul 20, 11:50 UTC2h 20m
2026-07-20 SWA2848 OAK → DAL Jul 20, 00:35 UTCJul 20, 02:45 UTC2h 10m
2026-07-19 SWA1359 DAL → MDW Jul 19, 21:40 UTCJul 19, 23:30 UTC1h 50m
2026-07-19 SWA1359 DAL → MDW Jul 19, 21:38 UTCJul 19, 23:29 UTC1h 51m
2026-07-19 SWA2218 BUR → SJC Jul 19, 18:08 UTCJul 19, 20:33 UTC2h 26m
2026-07-19 SWA2218 BUR → SJC Jul 19, 18:10 UTCJul 19, 20:35 UTC2h 25m
2026-07-19 SWA3369 SFO → LAS Jul 19, 13:50 UTCJul 19, 16:35 UTC2h 45m

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 N8540V page for operator, model, and routing details .

Mode-S ABB8A0 frequently asked

What is Mode-S code ABB8A0?
ABB8A0 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N8540V.
Where is Mode-S ABB8A0 registered?
Mode-S code ABB8A0 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 ABB8A0 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:15 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex ABB8A0, octal 52734240, decimal 11,253,920.
What flights does ABB8A0 operate?
Mode-S ABB8A0 has broadcast 20 distinct callsigns, including SWA573, SWA3630, SWA805, SWA4136, SWA239.