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sensors Mode-S transponder

ABBCA1

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N8552Z · BOEING 737-800 · operated by SOUTHWEST AIRLINES CO

Hex
ABBCA1
Octal
52736241
Decimal
11,254,945
Country
US
Tail
N8552Z
Type
B738
No current signal · last broadcast 1h ago
Flights observed
595
Distinct callsigns
20
Country
US
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S ABBCA1.

Country allocation

The ICAO 24-bit address ABBCA1 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
SWA4611 Southwest Airlines 5 2026-06-27
SWA3428 - 5 2026-06-25
SWA906 - 4 2026-07-12
SWA765 - 4 2026-07-03
SWA4047 Southwest Airlines 4 2026-06-10
SWA2749 - 4 2026-06-25
SWA2130 Southwest Airlines 4 2026-04-17
SWA742 - 3 2026-07-11
SWA642 - 3 2026-07-01
SWA4938 Southwest Airlines 3 2026-07-02
SWA4392 - 3 2026-07-06
SWA4177 Southwest Airlines 3 2026-06-10
SWA3807 Southwest Airlines 3 2026-05-26
SWA3566 Southwest Airlines 3 2026-06-19
SWA3027 Southwest Airlines 3 2026-06-16
SWA2931 Southwest Airlines 3 2026-04-28
SWA2731 - 3 2026-06-30
SWA2727 Southwest Airlines 3 2026-04-14
SWA2394 Southwest Airlines 3 2026-06-11
SWA2156 Southwest Airlines 3 2026-04-18

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-15 SWA2760 - Jul 15, 03:50 UTCJul 15, 04:00 UTC10m
2026-07-15 SWA2760 - Jul 15, 01:25 UTCJul 15, 02:15 UTC50m
2026-07-14 SWA596 ATL → TPA Jul 14, 23:00 UTCJul 14, 23:55 UTC55m
2026-07-14 SWA596 ATL → TPA Jul 14, 22:55 UTCJul 14, 23:52 UTC57m
2026-07-14 SWA373 AUS → ATL Jul 14, 20:10 UTCJul 14, 21:55 UTC1h 45m
2026-07-14 SWA576 - Jul 14, 17:05 UTCJul 14, 18:50 UTC1h 45m
2026-07-14 SWA576 - Jul 14, 13:30 UTCJul 14, 15:45 UTC2h 15m
2026-07-14 SWA2801 - Jul 14, 10:25 UTCJul 14, 12:05 UTC1h 40m
2026-07-14 SWA2801 MDW → LGA Jul 14, 10:20 UTCJul 14, 12:03 UTC1h 43m
2026-07-14 SWA4762 MCO → MDW Jul 14, 03:10 UTCJul 14, 05:30 UTC2h 20m
2026-07-14 SWA4311 MSY → MCO Jul 14, 00:05 UTCJul 14, 01:30 UTC1h 25m
2026-07-13 SWA4311 - Jul 13, 19:35 UTCJul 13, 23:10 UTC3h 35m
2026-07-13 SWA4495 - Jul 13, 13:40 UTCJul 13, 18:10 UTC4h 30m
2026-07-13 SWA4660 - Jul 13, 10:05 UTCJul 13, 12:15 UTC2h 10m
2026-07-13 SWA4660 MKE → MCO Jul 13, 10:03 UTCJul 13, 12:14 UTC2h 12m
2026-07-13 SWA1015 - Jul 13, 02:50 UTCJul 13, 04:15 UTC1h 25m
2026-07-13 SWA1015 BWI → MKE Jul 13, 02:45 UTCJul 13, 04:21 UTC1h 36m
2026-07-12 SWA929 - Jul 12, 22:00 UTCJul 13, 00:10 UTC2h 10m
2026-07-12 SWA929 MBJ → BWI Jul 12, 21:10 UTCJul 13, 00:05 UTC2h 55m
2026-07-12 SWA906 - Jul 12, 16:50 UTCJul 12, 19:01 UTC2h 10m
2026-07-12 SWA906 BWI → MBJ Jul 12, 16:45 UTCJul 12, 19:44 UTC2h 59m
2026-07-12 SWA2612 MCO → BWI Jul 12, 13:20 UTCJul 12, 15:10 UTC1h 50m
2026-07-12 SWA2612 MCO → BWI Jul 12, 13:18 UTCJul 12, 15:05 UTC1h 47m
2026-07-12 SWA4358 - Jul 12, 10:10 UTCJul 12, 12:01 UTC1h 50m
2026-07-12 SWA1747 PHX → STL Jul 12, 03:40 UTCJul 12, 06:15 UTC2h 35m
2026-07-12 SWA1529 DAL → PHX Jul 12, 00:35 UTCJul 12, 02:35 UTC2h 0m
2026-07-12 SWA1529 DAL → PHX Jul 12, 00:35 UTCJul 12, 02:38 UTC2h 3m
2026-07-11 SWA1529 - Jul 11, 21:20 UTCJul 11, 23:35 UTC2h 15m
2026-07-11 SWA3729 - Jul 11, 17:45 UTCJul 11, 20:20 UTC2h 35m
2026-07-11 SWA1788 SAN → MCI Jul 11, 14:08 UTCJul 11, 16:51 UTC2h 43m
2026-07-11 SWA1788 - Jul 11, 14:10 UTCJul 11, 16:55 UTC2h 45m
2026-07-11 SWA1704 - Jul 11, 05:45 UTCJul 11, 07:45 UTC2h 0m
2026-07-11 SWA742 BOS → DEN Jul 11, 00:35 UTCJul 11, 04:30 UTC3h 55m
2026-07-10 SWA4372 BNA → BOS Jul 10, 20:50 UTCJul 10, 23:00 UTC2h 10m
2026-07-10 SWA1991 - Jul 10, 18:20 UTCJul 10, 19:15 UTC55m
2026-07-10 SWA1991 - Jul 10, 14:35 UTCJul 10, 15:20 UTC45m
2026-07-10 SWA2636 - Jul 10, 11:25 UTCJul 10, 13:15 UTC1h 50m
2026-07-10 SWA3377 - Jul 10, 03:10 UTCJul 10, 04:55 UTC1h 45m
2026-07-10 SWA4211 - Jul 10, 00:05 UTCJul 10, 01:00 UTC55m
2026-07-10 SWA4211 MDW → PIT Jul 10, 00:00 UTCJul 10, 00:56 UTC56m
2026-07-09 SWA1755 - Jul 9, 21:55 UTCJul 9, 22:50 UTC55m
2026-07-09 SWA1755 LAS → DSM Jul 9, 18:10 UTCJul 9, 20:35 UTC2h 25m
2026-07-09 SWA2484 - Jul 9, 14:05 UTCJul 9, 14:15 UTC10m
2026-07-09 SWA2484 LGB → LAS Jul 9, 14:01 UTCJul 9, 14:45 UTC44m
2026-07-09 SWA1994 LAS → LGB Jul 9, 03:15 UTCJul 9, 04:00 UTC45m
2026-07-09 SWA1994 LAS → LGB Jul 9, 03:14 UTCJul 9, 03:56 UTC42m
2026-07-08 SWA2797 - Jul 8, 22:50 UTCJul 9, 02:05 UTC3h 15m
2026-07-08 SWA1531 - Jul 8, 20:55 UTCJul 8, 21:25 UTC30m
2026-07-08 SWA1531 GRR → MDW Jul 8, 20:52 UTCJul 8, 21:25 UTC33m
2026-07-08 SWA369 - Jul 8, 19:15 UTCJul 8, 19:45 UTC30m

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 N8552Z page for operator, model, and routing details .

Mode-S ABBCA1 frequently asked

What is Mode-S code ABBCA1?
ABBCA1 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N8552Z.
Where is Mode-S ABBCA1 registered?
Mode-S code ABBCA1 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 ABBCA1 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 ABBCA1, octal 52736241, decimal 11,254,945.
What flights does ABBCA1 operate?
Mode-S ABBCA1 has broadcast 20 distinct callsigns, including SWA4611, SWA3428, SWA906, SWA765, SWA4047.