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 Jul 26, 21:55 UTC
Flights observed
682
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:55 UTC

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
SWA1181 Southwest Airlines 4 2026-07-24
SWA735 - 3 2026-06-16
SWA66 Southwest Airlines 3 2026-07-20
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
SWA4474 - 3 2026-07-17

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SWA725 LAX → AUS Jul 26, 19:45 UTCJul 26, 21:55 UTC2h 10m
2026-07-26 SWA887 STL → CLE Jul 26, 17:30 UTCJul 26, 18:25 UTC55m
2026-07-26 SWA233 PWM → BWI Jul 26, 15:10 UTCJul 26, 16:10 UTC1h 0m
2026-07-26 SWA4088 BUR → SJC Jul 26, 13:15 UTCJul 26, 14:00 UTC45m
2026-07-26 SWA2276 PVD → BWI Jul 26, 07:30 UTCJul 26, 10:40 UTC3h 10m
2026-07-26 SWA3675 SJC → PDX Jul 26, 03:45 UTCJul 26, 04:50 UTC1h 5m
2026-07-26 SWA615 BWI → BOS Jul 26, 00:40 UTCJul 26, 02:25 UTC1h 45m
2026-07-26 SWA615 BWI → BOS Jul 26, 00:35 UTCJul 26, 02:17 UTC1h 42m
2026-07-25 SWA4769 ALB → FLL Jul 25, 20:52 UTCJul 25, 23:02 UTC2h 10m
2026-07-25 SWA4769 ALB → FLL Jul 25, 20:55 UTCJul 25, 23:00 UTC2h 5m
2026-07-25 SWA1838 LAS → BUR Jul 25, 17:30 UTCJul 25, 19:30 UTC2h 0m
2026-07-25 SWA1838 LAS → BUR Jul 25, 17:27 UTCJul 25, 19:30 UTC2h 3m
2026-07-25 SWA2714 BNA → MCO Jul 25, 14:15 UTCJul 25, 16:25 UTC2h 10m
2026-07-25 SWA1383 SAN → SFO Jul 25, 09:20 UTCJul 25, 12:50 UTC3h 30m
2026-07-25 SWA1383 SAN → SFO Jul 25, 09:17 UTCJul 25, 12:45 UTC3h 28m
2026-07-25 SWA2686 BWI → PWM Jul 25, 02:05 UTCJul 25, 05:05 UTC3h 0m
2026-07-24 SWA3668 OAK → SEA Jul 24, 22:25 UTCJul 25, 00:35 UTC2h 10m
2026-07-24 SWA1181 BNA → MDW Jul 24, 20:25 UTCJul 24, 21:20 UTC55m
2026-07-24 SWA1181 BNA → MDW Jul 24, 20:20 UTCJul 24, 21:15 UTC55m
2026-07-24 SWA1181 BNA → MDW Jul 24, 14:35 UTCJul 24, 19:15 UTC4h 40m
2026-07-24 SWA1181 BNA → MDW Jul 24, 11:05 UTCJul 24, 12:45 UTC1h 40m
2026-07-24 SWA4438 ONT → OAK Jul 24, 00:55 UTCJul 24, 02:25 UTC1h 30m
2026-07-24 SWA4438 ONT → OAK Jul 24, 00:52 UTCJul 24, 02:22 UTC1h 30m
2026-07-23 SWA3561 SJC → HNL Jul 23, 20:55 UTCJul 24, 00:00 UTC3h 5m
2026-07-23 SWA4045 TPA → MSY Jul 23, 18:00 UTCJul 23, 20:05 UTC2h 5m
2026-07-23 SWA650 BWI → AUS Jul 23, 15:25 UTCJul 23, 17:05 UTC1h 40m
2026-07-23 SWA650 BWI → AUS Jul 23, 15:22 UTCJul 23, 17:00 UTC1h 38m
2026-07-23 SWA872 MDW → RDU Jul 23, 13:00 UTCJul 23, 14:35 UTC1h 35m
2026-07-23 SWA872 MDW → RDU Jul 23, 12:55 UTCJul 23, 14:34 UTC1h 39m
2026-07-23 SWA4872 BUR → PHX Jul 23, 10:27 UTCJul 23, 10:55 UTC28m
2026-07-23 SWA4872 BUR → PHX Jul 23, 10:30 UTCJul 23, 11:05 UTC35m
2026-07-23 SWA2881 OAK → SEA Jul 23, 01:50 UTCJul 23, 04:00 UTC2h 10m
2026-07-23 SWA2881 OAK → SEA Jul 23, 01:46 UTCJul 23, 03:54 UTC2h 8m
2026-07-22 SWA2908 BUR → OAK Jul 22, 22:45 UTCJul 23, 00:45 UTC2h 0m
2026-07-22 SWA2908 BUR → OAK Jul 22, 22:44 UTCJul 23, 00:40 UTC1h 56m
2026-07-22 SWA4207 AUS → MSY Jul 22, 20:25 UTCJul 22, 21:35 UTC1h 10m
2026-07-22 SWA185 ATL → LGA Jul 22, 17:20 UTCJul 22, 19:15 UTC1h 55m
2026-07-22 SWA185 ATL → LGA Jul 22, 14:45 UTCJul 22, 16:15 UTC1h 30m
2026-07-22 SWA3346 - Jul 22, 05:15 UTCJul 22, 05:25 UTC10m
2026-07-22 SWA3346 PHX → SMF Jul 22, 05:10 UTCJul 22, 06:45 UTC1h 35m
2026-07-22 SWA4447 LAS → OAK Jul 22, 02:35 UTCJul 22, 04:10 UTC1h 35m
2026-07-21 SWA814 BUR → OAK Jul 21, 21:40 UTCJul 22, 01:00 UTC3h 20m
2026-07-21 SWA657 BNA → RSW Jul 21, 18:55 UTCJul 21, 20:30 UTC1h 35m
2026-07-21 SWA4003 TPA → BNA Jul 21, 16:05 UTCJul 21, 17:35 UTC1h 30m
2026-07-21 SWA4003 TPA → BNA Jul 21, 16:00 UTCJul 21, 17:25 UTC1h 25m
2026-07-21 SWA1785 LAS → SFO Jul 21, 14:15 UTCJul 21, 14:55 UTC40m
2026-07-21 SWA1785 LAS → SFO Jul 21, 14:14 UTCJul 21, 14:52 UTC38m
2026-07-21 SWA4627 PIT → TPA Jul 21, 10:50 UTCJul 21, 12:55 UTC2h 5m
2026-07-20 SWA2595 SJC → BUR Jul 20, 20:25 UTCJul 20, 23:10 UTC2h 45m
2026-07-20 SWA30 - Jul 20, 18:40 UTCJul 20, 19:20 UTC40m

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 Jul 26, 21:55 UTC.
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.