Apparatus

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sensors Mode-S transponder

ABB5E2

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N8537Z · BOEING 737-800 · operated by SOUTHWEST AIRLINES INC

Hex
ABB5E2
Octal
52732742
Decimal
11,253,218
Country
US
Tail
N8537Z
Type
B738
No current signal · last broadcast 1h ago
Flights observed
588
Distinct callsigns
20
Country
US
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S ABB5E2.

Country allocation

The ICAO 24-bit address ABB5E2 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
SWA468 - 5 2026-07-07
SWA193 - 5 2026-06-26
SWA4470 Southwest Airlines 4 2026-06-09
SWA376 - 4 2026-07-10
SWA2844 - 4 2026-07-12
SWA2127 Southwest Airlines 4 2026-04-20
SWA210 Southwest Airlines 4 2026-04-13
SWA1810 Southwest Airlines 4 2026-04-18
SWA1641 - 4 2026-07-07
SWA735 - 3 2026-06-16
SWA654 Southwest Airlines 3 2026-05-24
SWA505 Southwest Airlines 3 2026-05-28
SWA4860 Southwest Airlines 3 2026-06-23
SWA485 Southwest Airlines 3 2026-06-11
SWA483 - 3 2026-07-10
SWA4638 Southwest Airlines 3 2026-05-16
SWA4501 - 3 2026-06-30
SWA4392 - 3 2026-07-09
SWA4349 Southwest Airlines 3 2026-06-10
SWA431 Southwest Airlines 3 2026-06-04

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-15 SWA2787 - Jul 15, 02:30 UTCJul 15, 04:30 UTC2h 0m
2026-07-14 SWA233 ATL → MDW Jul 14, 23:55 UTCJul 15, 01:15 UTC1h 20m
2026-07-14 SWA233 ATL → MDW Jul 14, 23:51 UTCJul 15, 01:11 UTC1h 20m
2026-07-14 SWA3997 PIE → ATL Jul 14, 21:25 UTCJul 14, 22:40 UTC1h 15m
2026-07-14 SWA3560 DEN → TPA Jul 14, 17:15 UTCJul 14, 20:25 UTC3h 10m
2026-07-14 SWA4803 - Jul 14, 14:15 UTCJul 14, 15:55 UTC1h 40m
2026-07-14 SWA4803 PSP → DEN Jul 14, 14:06 UTCJul 14, 15:52 UTC1h 47m
2026-07-14 SWA8503 - Jul 14, 12:30 UTCJul 14, 13:05 UTC35m
2026-07-14 SWA8503 PHX → PSP Jul 14, 12:30 UTCJul 14, 13:12 UTC42m
2026-07-14 SWA4972 - Jul 14, 05:25 UTCJul 14, 07:20 UTC1h 55m
2026-07-14 SWA3230 BNA → DAL Jul 14, 01:50 UTCJul 14, 03:15 UTC1h 25m
2026-07-14 SWA3230 BNA → DAL Jul 14, 01:46 UTCJul 14, 03:05 UTC1h 19m
2026-07-13 SWA879 - Jul 13, 22:20 UTCJul 13, 23:55 UTC1h 35m
2026-07-13 SWA879 BWI → BNA Jul 13, 22:16 UTCJul 13, 23:33 UTC1h 17m
2026-07-13 SWA2848 - Jul 13, 20:45 UTCJul 13, 21:20 UTC35m
2026-07-13 SWA2848 - Jul 13, 17:55 UTCJul 13, 19:40 UTC1h 45m
2026-07-13 SWA2848 MDW → ORF Jul 13, 17:52 UTCJul 13, 19:40 UTC1h 48m
2026-07-13 SWA1779 - Jul 13, 13:05 UTCJul 13, 16:30 UTC3h 25m
2026-07-13 SWA1779 SFO → MDW Jul 13, 13:04 UTCJul 13, 16:50 UTC3h 47m
2026-07-13 SWA2893 - Jul 13, 03:05 UTCJul 13, 06:45 UTC3h 40m
2026-07-13 SWA3135 - Jul 13, 00:20 UTCJul 13, 01:55 UTC1h 35m
2026-07-13 SWA3135 ORF → MDW Jul 13, 00:17 UTCJul 13, 01:56 UTC1h 40m
2026-07-12 SWA1665 DEN → ORF Jul 12, 19:55 UTCJul 12, 23:10 UTC3h 15m
2026-07-12 SWA3397 SEA → DEN Jul 12, 16:25 UTCJul 12, 18:35 UTC2h 10m
2026-07-12 SWA3397 OAK → SEA Jul 12, 13:10 UTCJul 12, 14:35 UTC1h 25m
2026-07-12 SWA1650 DEN → OAK Jul 12, 03:45 UTCJul 12, 05:45 UTC2h 0m
2026-07-12 SWA2844 - Jul 12, 00:50 UTCJul 12, 01:55 UTC1h 5m
2026-07-12 SWA2844 OMA → DEN Jul 12, 00:49 UTCJul 12, 01:58 UTC1h 10m
2026-07-11 SWA2844 - Jul 11, 23:10 UTCJul 12, 00:10 UTC1h 0m
2026-07-11 SWA2844 MSY → MDW Jul 11, 20:20 UTCJul 11, 22:10 UTC1h 50m
2026-07-11 SWA1021 AUS → MSY Jul 11, 17:25 UTCJul 11, 19:10 UTC1h 45m
2026-07-11 SWA1021 AUS → MSY Jul 11, 17:23 UTCJul 11, 19:06 UTC1h 43m
2026-07-11 SWA2417 LAS → AUS Jul 11, 14:05 UTCJul 11, 16:20 UTC2h 15m
2026-07-11 SWA2417 LAS → AUS Jul 11, 14:01 UTCJul 11, 16:16 UTC2h 15m
2026-07-11 SWA1351 PHX → LAS Jul 11, 05:55 UTCJul 11, 06:35 UTC40m
2026-07-11 SWA3452 - Jul 11, 02:25 UTCJul 11, 03:50 UTC1h 25m
2026-07-11 SWA3331 - Jul 11, 00:10 UTCJul 11, 01:25 UTC1h 15m
2026-07-10 SWA376 AUS → PHX Jul 10, 21:00 UTCJul 10, 22:50 UTC1h 50m
2026-07-10 SWA483 - Jul 10, 17:50 UTCJul 10, 19:55 UTC2h 5m
2026-07-10 SWA483 CVG → AUS Jul 10, 17:45 UTCJul 10, 19:47 UTC2h 2m
2026-07-10 SWA483 BNA → CVG Jul 10, 16:00 UTCJul 10, 16:45 UTC45m
2026-07-10 SWA1483 DEN → BNA Jul 10, 11:55 UTCJul 10, 14:05 UTC2h 10m
2026-07-10 SWA1483 DEN → BNA Jul 10, 11:52 UTCJul 10, 13:58 UTC2h 6m
2026-07-10 SWA2457 LGA → DEN Jul 10, 04:25 UTCJul 10, 08:25 UTC4h 0m
2026-07-09 SWA4021 - Jul 9, 21:35 UTCJul 10, 00:45 UTC3h 10m
2026-07-09 SWA4392 IAH → DAL Jul 9, 19:50 UTCJul 9, 20:30 UTC40m
2026-07-09 SWA4392 HOU → DAL Jul 9, 19:45 UTCJul 9, 20:32 UTC47m
2026-07-09 SWA4392 - Jul 9, 18:10 UTCJul 9, 18:45 UTC35m
2026-07-09 SWA930 - Jul 9, 16:15 UTCJul 9, 16:45 UTC30m
2026-07-09 SWA930 - Jul 9, 12:30 UTCJul 9, 15:00 UTC2h 30m

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 N8537Z page for operator, model, and routing details .

Mode-S ABB5E2 frequently asked

What is Mode-S code ABB5E2?
ABB5E2 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N8537Z.
Where is Mode-S ABB5E2 registered?
Mode-S code ABB5E2 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 ABB5E2 broadcasting right now?
No active broadcast right now. Last signal was 1h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex ABB5E2, octal 52732742, decimal 11,253,218.
What flights does ABB5E2 operate?
Mode-S ABB5E2 has broadcast 20 distinct callsigns, including SWA468, SWA193, SWA4470, SWA376, SWA2844.