Apparatus

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sensors Mode-S transponder

ABB271

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N8529Z · BOEING 737-800 · operated by SOUTHWEST AIRLINES CO

Hex
ABB271
Octal
52731161
Decimal
11,252,337
Country
US
Tail
N8529Z
Type
B738
No current signal · last broadcast Jul 26, 22:15 UTC
Flights observed
761
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:15 UTC

Last known position

Most recent position reported by Mode-S ABB271.

Country allocation

The ICAO 24-bit address ABB271 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
SWA4133 Southwest Airlines 5 2026-06-09
SWA2940 Southwest Airlines 5 2026-04-17
SWA1898 - 5 2026-07-13
SWA1266 Southwest Airlines 5 2026-05-05
SWA588 Southwest Airlines 4 2026-04-14
SWA3820 Southwest Airlines 4 2026-04-13
SWA3801 Southwest Airlines 4 2026-04-16
SWA3718 Southwest Airlines 4 2026-04-16
SWA3292 - 4 2026-07-18
SWA2893 - 4 2026-06-26
SWA2844 - 4 2026-07-17
SWA2701 Southwest Airlines 4 2026-04-19
SWA2449 Southwest Airlines 4 2026-04-27
SWA1524 Southwest Airlines 4 2026-06-05
SWA146 Southwest Airlines 4 2026-06-09
SWA1361 Southwest Airlines 4 2026-06-10
SWA1322 Southwest Airlines 4 2026-07-25
SWA1283 - 4 2026-07-14
SWA882 Southwest Airlines 3 2026-06-07
SWA706 Southwest Airlines 3 2026-05-31

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SWA441 HOU → DEN Jul 26, 22:05 UTCJul 26, 22:15 UTC10m
2026-07-26 SWA804 BWI → ALB Jul 26, 19:05 UTCJul 26, 20:30 UTC1h 25m
2026-07-26 SWA804 BWI → ALB Jul 26, 17:05 UTCJul 26, 18:00 UTC55m
2026-07-26 SWA1660 SLC → DEN Jul 26, 14:20 UTCJul 26, 16:05 UTC1h 45m
2026-07-26 SWA3909 MKE → PHX Jul 26, 10:50 UTCJul 26, 12:40 UTC1h 50m
2026-07-26 SWA4964 MKE → MCO Jul 26, 00:50 UTCJul 26, 02:35 UTC1h 45m
2026-07-26 SWA4964 MKE → MCO Jul 26, 00:45 UTCJul 26, 02:35 UTC1h 50m
2026-07-25 SWA147 OAK → LAS Jul 25, 22:10 UTCJul 25, 23:50 UTC1h 40m
2026-07-25 SWA147 OAK → LAS Jul 25, 19:40 UTCJul 25, 21:20 UTC1h 40m
2026-07-25 SWA2096 OAK → LAS Jul 25, 17:40 UTCJul 25, 18:25 UTC45m
2026-07-25 SWA2096 OAK → LAS Jul 25, 15:10 UTCJul 25, 16:35 UTC1h 25m
2026-07-25 SWA1242 BUR → SJC Jul 25, 12:35 UTCJul 25, 13:35 UTC1h 0m
2026-07-25 SWA1242 BUR → SJC Jul 25, 12:35 UTCJul 25, 13:30 UTC55m
2026-07-25 SWA2229 PHX → SFO Jul 25, 03:35 UTCJul 25, 05:00 UTC1h 25m
2026-07-25 SWA1322 OAK → BUR Jul 25, 02:05 UTCJul 25, 02:50 UTC45m
2026-07-25 SWA1322 OAK → BUR Jul 25, 02:04 UTCJul 25, 02:45 UTC41m
2026-07-24 SWA1322 OAK → BUR Jul 24, 22:20 UTCJul 25, 00:45 UTC2h 25m
2026-07-24 SWA1322 OAK → BUR Jul 24, 19:45 UTCJul 24, 21:05 UTC1h 20m
2026-07-24 SWA409 MDW → STL Jul 24, 17:05 UTCJul 24, 18:45 UTC1h 40m
2026-07-24 SWA409 MDW → STL Jul 24, 17:01 UTCJul 24, 18:39 UTC1h 38m
2026-07-24 SWA3758 AUS → MSY Jul 24, 12:50 UTCJul 24, 15:55 UTC3h 5m
2026-07-24 SWA3213 MDW → BNA Jul 24, 04:05 UTCJul 24, 05:15 UTC1h 10m
2026-07-24 SWA3213 MDW → BNA Jul 24, 04:03 UTCJul 24, 05:15 UTC1h 12m
2026-07-24 SWA3813 DAL → MSY Jul 24, 02:10 UTCJul 24, 03:20 UTC1h 10m
2026-07-24 SWA3813 DAL → MSY Jul 24, 02:10 UTCJul 24, 03:09 UTC59m
2026-07-23 SWA1308 DEN → SJC Jul 23, 23:45 UTCJul 24, 00:45 UTC1h 0m
2026-07-23 SWA1308 DEN → SJC Jul 23, 23:41 UTCJul 24, 00:44 UTC1h 3m
2026-07-23 SWA4701 OAK → LAX Jul 23, 19:20 UTCJul 23, 22:30 UTC3h 10m
2026-07-23 SWA964 OAK → RNO Jul 23, 16:45 UTCJul 23, 18:05 UTC1h 20m
2026-07-23 SWA3658 SAT → LAS Jul 23, 13:40 UTCJul 23, 15:30 UTC1h 50m
2026-07-23 SWA3658 SAT → LAS Jul 23, 10:30 UTCJul 23, 12:15 UTC1h 45m
2026-07-23 SWA4690 LAS → SMF Jul 23, 03:40 UTCJul 23, 05:30 UTC1h 50m
2026-07-23 SWA4690 LAS → SMF Jul 23, 03:36 UTCJul 23, 05:26 UTC1h 50m
2026-07-22 SWA4600 SLC → OAK Jul 22, 23:05 UTCJul 23, 02:10 UTC3h 5m
2026-07-22 SWA4600 SLC → OAK Jul 22, 23:01 UTCJul 23, 02:07 UTC3h 6m
2026-07-22 SWA1791 BWI → BUF Jul 22, 19:50 UTCJul 22, 22:05 UTC2h 15m
2026-07-22 SWA322 OMA → DEN Jul 22, 16:55 UTCJul 22, 18:45 UTC1h 50m
2026-07-22 SWA322 OMA → DEN Jul 22, 13:25 UTCJul 22, 15:40 UTC2h 15m
2026-07-22 SWA4363 TPA → MKE Jul 22, 10:20 UTCJul 22, 11:55 UTC1h 35m
2026-07-22 SWA4363 TPA → MKE Jul 22, 10:06 UTCJul 22, 11:52 UTC1h 46m
2026-07-22 SWA1542 DEN → OAK Jul 22, 02:10 UTCJul 22, 03:45 UTC1h 35m
2026-07-21 SWA3595 ONT → LAS Jul 21, 20:40 UTCJul 21, 23:30 UTC2h 50m
2026-07-21 SWA3595 ONT → LAS Jul 21, 20:38 UTCJul 21, 23:29 UTC2h 52m
2026-07-21 SWA302 OAK → ONT Jul 21, 18:17 UTCJul 21, 19:23 UTC1h 7m
2026-07-21 SWA3732 - Jul 21, 15:55 UTCJul 21, 17:20 UTC1h 25m
2026-07-21 SWA3866 - Jul 21, 11:20 UTCJul 21, 14:30 UTC3h 10m
2026-07-21 SWA36 CRP → HOU Jul 21, 00:55 UTCJul 21, 02:20 UTC1h 25m
2026-07-20 SWA36 CRP → HOU Jul 20, 22:15 UTCJul 21, 00:05 UTC1h 49m
2026-07-20 SWA36 CRP → HOU Jul 20, 20:20 UTCJul 20, 21:05 UTC45m
2026-07-20 SWA2483 HOU → DEN Jul 20, 16:05 UTCJul 20, 19:10 UTC3h 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 N8529Z page for operator, model, and routing details .

Mode-S ABB271 frequently asked

What is Mode-S code ABB271?
ABB271 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N8529Z.
Where is Mode-S ABB271 registered?
Mode-S code ABB271 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 ABB271 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 ABB271, octal 52731161, decimal 11,252,337.
What flights does ABB271 operate?
Mode-S ABB271 has broadcast 20 distinct callsigns, including SWA4133, SWA2940, SWA1898, SWA1266, SWA588.