Apparatus

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sensors Mode-S transponder

ABB601

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N8538V · BOEING 737-800 · operated by SOUTHWEST AIRLINES CO

Hex
ABB601
Octal
52733001
Decimal
11,253,249
Country
US
Tail
N8538V
Type
B738
No current signal · last broadcast Jul 26, 22:10 UTC
Flights observed
411
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:10 UTC

Last known position

Most recent position reported by Mode-S ABB601.

Country allocation

The ICAO 24-bit address ABB601 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
SWA2720 Southwest Airlines 5 2026-07-08
SWA712 Southwest Airlines 4 2026-05-31
SWA4539 - 4 2026-07-07
SWA449 - 4 2026-07-12
SWA2035 - 4 2026-06-28
SWA193 - 4 2026-07-04
SWA647 Southwest Airlines 3 2026-06-20
SWA3316 - 3 2026-06-27
SWA2528 - 3 2026-07-05
SWA1363 Southwest Airlines 3 2026-06-15
SWA1122 - 3 2026-06-29
SWA1077 Southwest Airlines 3 2026-05-20
SWA1064 Southwest Airlines 3 2026-05-20
SWA984 - 2 2026-06-26
SWA8750 Southwest Airlines 2 2026-05-17
SWA823 - 2 2026-06-20
SWA781 Southwest Airlines 2 2026-06-07
SWA753 - 2 2026-07-02
SWA738 Southwest Airlines 2 2026-06-13
SWA608 Southwest Airlines 2 2026-06-07

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SWA2988 HRL → HOU Jul 26, 20:50 UTCJul 26, 22:10 UTC1h 20m
2026-07-26 SWA445 DEN → ICT Jul 26, 19:20 UTCJul 26, 19:35 UTC15m
2026-07-26 SWA445 DEN → ICT Jul 26, 17:55 UTCJul 26, 18:50 UTC55m
2026-07-26 SWA4261 ABQ → DEN Jul 26, 15:20 UTCJul 26, 16:25 UTC1h 5m
2026-07-26 SWA3209 OAK → LAS Jul 26, 12:40 UTCJul 26, 14:10 UTC1h 30m
2026-07-26 SWA4698 PHX → OAK Jul 26, 03:35 UTCJul 26, 05:50 UTC2h 15m
2026-07-26 SWA3063 SNA → OAK Jul 26, 00:25 UTCJul 26, 02:00 UTC1h 35m
2026-07-26 SWA3063 SNA → OAK Jul 26, 00:25 UTCJul 26, 01:59 UTC1h 34m
2026-07-25 SWA4190 SJC → LAS Jul 25, 21:50 UTCJul 25, 23:25 UTC1h 35m
2026-07-25 SWA4552 SJC → DEN Jul 25, 16:55 UTCJul 25, 20:20 UTC3h 25m
2026-07-25 SWA4552 SJC → DEN Jul 25, 16:53 UTCJul 25, 20:22 UTC3h 30m
2026-07-25 SWA4329 TPA → MDW Jul 25, 12:50 UTCJul 25, 15:25 UTC2h 35m
2026-07-25 SWA4329 TPA → MDW Jul 25, 12:45 UTCJul 25, 15:26 UTC2h 41m
2026-07-25 SWA693 MCI → DEN Jul 25, 00:50 UTCJul 25, 03:30 UTC2h 40m
2026-07-24 SWA1034 AUS → HRL Jul 24, 22:35 UTCJul 24, 23:20 UTC45m
2026-07-24 SWA191 ONT → SJC Jul 24, 20:25 UTCJul 24, 21:45 UTC1h 20m
2026-07-24 SWA346 BOS → BNA Jul 24, 17:25 UTCJul 24, 19:05 UTC1h 40m
2026-07-24 SWA4427 HNL → LAS Jul 24, 15:30 UTCJul 24, 16:20 UTC50m
2026-07-24 SWA1519 - Jul 24, 12:35 UTCJul 24, 13:55 UTC1h 20m
2026-07-24 SWA4512 LAS → PSP Jul 24, 10:45 UTCJul 24, 11:35 UTC50m
2026-07-24 SWA296 BNA → LGA Jul 24, 04:45 UTCJul 24, 05:40 UTC55m
2026-07-24 SWA1822 LGB → AUS Jul 24, 02:30 UTCJul 24, 03:20 UTC50m
2026-07-23 SWA2254 BNA → LGA Jul 23, 23:32 UTCJul 24, 01:20 UTC1h 48m
2026-07-23 SWA2254 BNA → LGA Jul 23, 23:35 UTCJul 24, 01:20 UTC1h 45m
2026-07-23 SWA8506 LAS → OAK Jul 23, 18:00 UTCJul 23, 20:30 UTC2h 30m
2026-07-14 SWA8511 OAK → PAE Jul 14, 19:25 UTCJul 14, 20:50 UTC1h 25m
2026-07-14 SWA3306 - Jul 14, 04:50 UTCJul 14, 06:20 UTC1h 30m
2026-07-14 SWA3306 PHX → OAK Jul 14, 04:50 UTCJul 14, 06:18 UTC1h 28m
2026-07-14 SWA1885 GEG → PHX Jul 14, 01:30 UTCJul 14, 03:40 UTC2h 10m
2026-07-13 SWA4440 - Jul 13, 22:40 UTCJul 14, 00:15 UTC1h 35m
2026-07-13 SWA4440 DEN → GEG Jul 13, 22:36 UTCJul 14, 00:26 UTC1h 50m
2026-07-13 SWA2945 - Jul 13, 19:30 UTCJul 13, 21:20 UTC1h 50m
2026-07-13 SWA4104 - Jul 13, 15:05 UTCJul 13, 18:10 UTC3h 5m
2026-07-13 SWA3751 - Jul 13, 12:35 UTCJul 13, 13:40 UTC1h 5m
2026-07-13 SWA4792 PHX → SLC Jul 13, 05:50 UTCJul 13, 07:05 UTC1h 15m
2026-07-13 SWA4792 PHX → SLC Jul 13, 05:50 UTCJul 13, 07:01 UTC1h 11m
2026-07-13 SWA4317 - Jul 13, 04:15 UTCJul 13, 05:10 UTC55m
2026-07-13 SWA543 OAK → ABQ Jul 13, 00:06 UTCJul 13, 02:00 UTC1h 54m
2026-07-13 SWA543 OAK → ABQ Jul 13, 00:10 UTCJul 13, 02:05 UTC1h 55m
2026-07-12 SWA3519 SAN → OAK Jul 12, 22:06 UTCJul 12, 23:06 UTC1h 0m
2026-07-12 SWA3519 - Jul 12, 22:05 UTCJul 12, 22:15 UTC10m
2026-07-12 SWA1139 LAS → SAN Jul 12, 15:45 UTCJul 12, 20:35 UTC4h 50m
2026-07-12 SWA2403 - Jul 12, 13:30 UTCJul 12, 14:15 UTC45m
2026-07-12 SWA2403 LAX → LAS Jul 12, 13:30 UTCJul 12, 14:15 UTC45m
2026-07-12 SWA1875 - Jul 12, 03:35 UTCJul 12, 06:45 UTC3h 10m
2026-07-12 SWA449 - Jul 12, 00:50 UTCJul 12, 02:30 UTC1h 40m
2026-07-11 SWA542 - Jul 11, 20:15 UTCJul 11, 21:20 UTC1h 5m
2026-07-11 SWA542 BNA → JAX Jul 11, 20:10 UTCJul 11, 21:19 UTC1h 9m
2026-07-11 SWA4472 - Jul 11, 17:05 UTCJul 11, 19:10 UTC2h 5m
2026-07-11 SWA4472 BDL → BNA Jul 11, 17:05 UTCJul 11, 19:06 UTC2h 1m

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 N8538V page for operator, model, and routing details .

Mode-S ABB601 frequently asked

What is Mode-S code ABB601?
ABB601 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N8538V.
Where is Mode-S ABB601 registered?
Mode-S code ABB601 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 ABB601 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:10 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex ABB601, octal 52733001, decimal 11,253,249.
What flights does ABB601 operate?
Mode-S ABB601 has broadcast 20 distinct callsigns, including SWA2720, SWA712, SWA4539, SWA449, SWA2035.